Learning Forum

[Francesco Miccoli]

Hello everyone,

I am trying to implement in Ansys MAPDL a convection load on a named selection (curve, axis-symmetrical problem). The convection I have is defined by a TEMP (surface temperature) and X (coordinate) variable film coefficient and an X varibale bulk temperature. So far I came up with:

*dim,bartz,TABLE,50,61,X,TEMP

*taxis,bartz(1),1,... (where ... represent all the value composing the X vector)

*taxis,bartz(1),2,... (where ... represent all the value composing the TEMP vector)

bartz(1,1) = ...

...

bartz(1,61) = ...

...

bartz(50,61)= ...

 

*dim,bulk,TABLE,50,X

*taxis,bulk(1),1,... (where ... represent all the value composing the X vector)

bulk(1) = ...

...

bulk(50) = ...

SF,name_of_selection,conv,%bartz%,%bulk%

 

but even though the simulation runs without errors the results I obtain do not make sense. What am I doing wrong?

Thanks in advance, Francesco

 

[Chandra Sekaran]

One suggestion is to go into the postprocessor Post1, do SET command to bring in a result set at a particular time point. Then display / list the convection loads. This will show the actual values used at that time point. This will be good way to check if you got what you intended.

[Francesco Miccoli]

Thank you for the reply. Unfortunately the results still do not make sense.
Consider that the defined film coefficient I defined (bartz) has a peak for a value of X of around 0.5 of the total lenght, the same goes for the bulk temperature (bulk). With this input data I would expect the peak temperature to be at around 0.5 of the lenght and drop significantly after that, but the result I get is very incosistent with this. For this reason I think there is some problem with the definition of either the loads or of the TABLEs.

[Chandra Sekaran]

Can you confirm that the listing of the boundary conditions at a time point in Post1, shows that the film coeff and bulk temperature are applied as per the table?

 

[dlooman]

It's definitely tricky to do.  It's helpful to cut and paste (or /input) your table array into the input window in the APDL gui and then examine it with Parameters (top toolbar): Array Parameters> Define/Edit...

Here's input for a 4d array that worked.

*dim,hc_vals,tab4,2,2,2,2,x,y,z,time

*taxis,hc_vals(1),1,0,1

*taxis,hc_vals(1),2,0,1

*taxis,hc_vals(1),3,0,1

*taxis,hc_vals(1),4,0,1

 

! Time 0 values

hc_vals(1,1,1,1)=1,2

hc_vals(1,2,1,1)=3,4

 

hc_vals(1,1,2,1)=5,6

hc_vals(1,2,2,1)=7,8

 

! Time 1 values

hc_vals(1,1,1,2)=11,21

hc_vals(1,2,1,2)=31,41

 

hc_vals(1,1,2,2)=51,61

hc_vals(1,2,2,2)=71,81

 

*dim,tb_vals,tab4,2,2,2,2,x,y,z,time

*taxis,tb_vals(1),1,0,1

*taxis,tb_vals(1),2,0,1

*taxis,tb_vals(1),3,0,1

*taxis,tb_vals(1),4,0,1

 

! Time 0 values

tb_vals(1,1,1,1)=10,200

tb_vals(1,2,1,1)=30,400

 

tb_vals(1,1,2,1)=50,60

tb_vals(1,2,2,1)=70,80

 

! Time 1 values

tb_vals(1,1,1,2)=110,210

tb_vals(1,2,1,2)=310,410

 

tb_vals(1,1,2,2)=510,610

tb_vals(1,2,2,2)=710,810

 

nsel,s,ext

sf,all,conv,%hc_vals%,%tb_vals%

nsel,all

[Francesco Miccoli]

Why when defining table values like in:
hc_vals(1,1,1,1)=1,2
do we put two values after the =? Is that something that I should do with a 2d table too?

[dlooman]

My example is only a 2x2x2x2 table, so I can specify the whole column of (2) values after the equal sign.  You can specify up to 10 values after the equal sign.  

[Francesco Miccoli]

Thanks, well your code looks very similar to mine, I don't understand why it is not working then... maybe something to do with coordinates? If I say that the h values are a function of X, does the solver look at the X value of the name_selection with an absolute value (so the first element of named_selection is at X=0) or with a relative one?

[Chandra Sekaran]

The X value is interpreted to be in the coordinate system that you choose. The default is Global Cartesian system. So the solver will look at the X coordinate of every point in your named selection and interpolate to get the corresponding h value at that location.

 

[Francesco Miccoli]

Then why does the result of the simulation is indipendent on the values of X that I use? For example, this code:

*dim,bartz,TABLE,4,3,X,TEMP
*taxis,bartz(1),1,0.13,0.15,0.16,0.20
*taxis,bartz(1),2,200,800,1400
bartz(1,1) = 1000
bartz(2,1) = 10000
bartz(3,1) = 10000
bartz(4,1) = 1000

bartz(1,2) = 1000
bartz(2,2) = 10000
bartz(3,2) = 10000
bartz(4,2) = 1000

bartz(1,3) = 1000
bartz(2,3) = 10000
bartz(3,3) = 10000
bartz(4,3) = 1000

*dim,bulk,TABLE,4,X
*taxis,bulk(1),1,0.13,0.15,0.16,0.20
bulk(1) = 500
bulk(2) = 3500
bulk(3) = 3500
bulk(4) = 500

sf,nozzle_selection,conv,%bartz%,%bulk%

produces the same exact results as this? (I am changing the X coordinate)

*dim,bartz,TABLE,4,3,X,TEMP
*taxis,bartz(1),1,0,0.02,0.03,0.05
*taxis,bartz(1),2,200,800,1400
bartz(1,1) = 1000
bartz(2,1) = 10000
bartz(3,1) = 10000
bartz(4,1) = 1000

bartz(1,2) = 1000
bartz(2,2) = 10000
bartz(3,2) = 10000
bartz(4,2) = 1000

bartz(1,3) = 1000
bartz(2,3) = 10000
bartz(3,3) = 10000
bartz(4,3) = 1000

*dim,bulk,TABLE,4,X
*taxis,bulk(1),1,0,0.02,0.03,0.05
bulk(1) = 500
bulk(2) = 3500
bulk(3) = 3500
bulk(4) = 500

sf,nozzle_selection,conv,%bartz%,%bulk%

It seems like it is not understanding that X is the coordinate, otherwise why would the result be indipendet of the X value?

[Francesco Miccoli]

Also, I am setting the bulk temperature variable with X with a max value of 2500K. But then, whith no other heat generation or transfer, the surface temperature of the piece subject to the convection gets to 2700K, making it evident that there is an error somewhere

[Chandra Sekaran]

Hello Francesco, can you go to Post1 (example commands below) and see if the loads are being applied properly?

/post1

set,last   ! last time point

cmsel,s,nozzle_selection    ! select the nodes of the nozzle

nlist             ! list and make sure the X coordinates are in the range of 0.13 to 0.20

sflist         ! based on time and X you should be see if the right values are being applied from the table.

Right now I am not sure whether you are saying the load is not being applied correctly or if you are saying the load is being applied correctly but the results are wrong.

[Francesco Miccoli]

Thank you for the help with commands, it happears as if the film coefficient and bulk temperatures are not interpolated (note that I have used the APDL commands I sent in the reply before, but started the X vector from 0.13 instead of 0):

***** MAPDL RESULTS INTERPRETATION (POST1) *****

 *** NOTE ***                            CP =      26.344   TIME= 21:23:59
 Reading results into the database (SET command) will update the current 
 displacement and force boundary conditions in the database with the     
 values from the results file for that load set.  Note that any          
 subsequent solutions will use these values unless action is taken to    
 either SAVE the current values or not overwrite them (/EXIT,NOSAVE).    

 USE LAST SUBSTEP ON RESULT FILE  FOR LOAD CASE 0 

 SET COMMAND GOT LOAD STEP=     6  SUBSTEP=    51  CUMULATIVE ITERATION=   449
   TIME/FREQUENCY=  6.0000    
 TITLE= mk1--Transient Thermal (L5)                                             

 SELECT      COMPONENT NOZZLE_SELECTION                                                                                                                                                                                                                                                

 LIST ALL SELECTED NODES.   DSYS=      0

 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2          23.2     ***
 Ansys Mechanical Enterprise Academic Research     
 01148981  VERSION=WINDOWS x64   21:23:59  MAR 11, 2024 CP=     26.594

 mk1--Transient Thermal (L5)                                                   

 

    NODE        X             Y             Z           THXY     THYZ     THZX
        1  0.18635       0.27697E-001   0.0000          0.00     0.00     0.00
        2  0.13040       0.28297E-001   0.0000          0.00     0.00     0.00
        3  0.18540       0.27418E-001 -0.60031E-017     0.00     0.00     0.00
        4  0.18444       0.27129E-001 -0.57611E-017     0.00     0.00     0.00
        .... (omitted)
       50  0.14257       0.16494E-001  0.45903E-017     0.00     0.00     0.00

 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2          23.2     ***
 Ansys Mechanical Enterprise Academic Research     
 01148981  VERSION=WINDOWS x64   21:23:59  MAR 11, 2024 CP=     27.531

 mk1--Transient Thermal (L5)                                                   

 

    NODE        X             Y             Z           THXY     THYZ     THZX
       51  0.14178       0.17095E-001  0.46890E-017     0.00     0.00     0.00
       .... (omitted)
     1735  0.15704       0.14044E-001  0.17629E-017     0.00     0.00     0.00

 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2          23.2     ***
 Ansys Mechanical Enterprise Academic Research     
 01148981  VERSION=WINDOWS x64   21:23:59  MAR 11, 2024 CP=     28.703

 mk1--Transient Thermal (L5)                                                   

 

    NODE        X             Y             Z           THXY     THYZ     THZX
     1737  0.15620       0.13509E-001  0.20108E-017     0.00     0.00     0.00
     .... (omitted)
     1797  0.13145       0.27243E-001  0.56777E-017     0.00     0.00     0.00

 *** NOTE ***                            CP =      29.406   TIME= 21:23:59
 The surface loads listed are the current database values and are not    
 necessarily the values corresponding to the current results data set.   
 Tabular boundary conditions, however, do list values corresponding to   
 the current results set.                                                

 LIST NODAL SURFACE LOAD CONV FOR ALL SELECTED NODES

 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2          23.2     ***
 Ansys Mechanical Enterprise Academic Research     
 01148981  VERSION=WINDOWS x64   21:23:59  MAR 11, 2024 CP=     29.406

 mk1--Transient Thermal (L5)                                                   

 

 ELEMENT  LKEY     FACE NODES       FILM COEFFICIENT      TBULK
     350     2           1            1000.00000      500.000000    
                         3            1000.00000      500.000000    
     351     2           3            1000.00000      500.000000    
                         4            1000.00000      500.000000    
     352     2           4            1000.00000      500.000000    
                         5            1000.00000      500.000000    
     353     2           5            1000.00000      500.000000    
                         6            1000.00000      500.000000    
     354     2           6            1000.00000      500.000000    
                         7            1000.00000      500.000000    
     355     2           7            1000.00000      500.000000    
                         8            1000.00000      500.000000    
     356     2           8            1000.00000      500.000000    
                         9            1000.00000      500.000000    
     357     2           9            1000.00000      500.000000    
                        10            1000.00000      500.000000    
     358     2          10            1000.00000      500.000000    
                        11            1000.00000      500.000000    
     359     2          11            1000.00000      500.000000    
                        12            1000.00000      500.000000    
     360     2          12            1000.00000      500.000000    
                        13            1000.00000      500.000000    
     361     2          13            1000.00000      500.000000    
                        14            1000.00000      500.000000    
     362     2          14            1000.00000      500.000000    
                        15            1000.00000      500.000000    
     363     2          15            1000.00000      500.000000    
                        16            1000.00000      500.000000    
     364     2          16            1000.00000      500.000000    
                        17            1000.00000      500.000000    
     365     2          17            1000.00000      500.000000    
                        18            1000.00000      500.000000    
     366     2          18            1000.00000      500.000000    
                        19            1000.00000      500.000000    
     367     2          19            1000.00000      500.000000    
                        20            1000.00000      500.000000    
     368     2          20            1000.00000      500.000000    
                        21            1000.00000      500.000000    
     369     2          21            1000.00000      500.000000    
                        22            1000.00000      500.000000    
     370     2          22            1000.00000      500.000000    
                        23            1000.00000      500.000000    
     371     2          23            1000.00000      500.000000    
                        24            1000.00000      500.000000    
     372     2          24            1000.00000      500.000000    
                        25            1000.00000      500.000000    
     373     2          25            1000.00000      500.000000    
                        26            1000.00000      500.000000    
     374     2          26            1000.00000      500.000000    
                        27            1000.00000      500.000000    

 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2          23.2     ***
 Ansys Mechanical Enterprise Academic Research     
 01148981  VERSION=WINDOWS x64   21:23:59  MAR 11, 2024 CP=     29.406

 mk1--Transient Thermal (L5)                                                   

 

 ELEMENT  LKEY     FACE NODES       FILM COEFFICIENT      TBULK
     375     2          27            1000.00000      500.000000    
                        28            1000.00000      500.000000    
     376     2          28            1000.00000      500.000000    
                        29            1000.00000      500.000000    
     377     2          29            1000.00000      500.000000    
                        30            1000.00000      500.000000    
     378     2          30            1000.00000      500.000000    
                        31            1000.00000      500.000000    
     379     2          31            1000.00000      500.000000    
                        32            1000.00000      500.000000    
     380     2          32            1000.00000      500.000000    
                        33            1000.00000      500.000000    
     381     2          33            1000.00000      500.000000    
                        34            1000.00000      500.000000    
     382     2          34            1000.00000      500.000000    
                        35            1000.00000      500.000000    
     383     2          35            1000.00000      500.000000    
                        36            1000.00000      500.000000    
     384     2          36            1000.00000      500.000000    
                        37            1000.00000      500.000000    
     385     2          37            1000.00000      500.000000    
                        38            1000.00000      500.000000    
     386     2          38            1000.00000      500.000000    
                        39            1000.00000      500.000000    
     387     2          39            1000.00000      500.000000    
                        40            1000.00000      500.000000    
     388     2          40            1000.00000      500.000000    
                        41            1000.00000      500.000000    
     389     2          41            1000.00000      500.000000    
                        42            1000.00000      500.000000    
     390     2          42            1000.00000      500.000000    
                        43            1000.00000      500.000000    
     391     2          43            1000.00000      500.000000    
                        44            1000.00000      500.000000    
     392     2          44            1000.00000      500.000000    
                        45            1000.00000      500.000000    
     393     2          45            1000.00000      500.000000    
                        46            1000.00000      500.000000    
     394     2          46            1000.00000      500.000000    
                        47            1000.00000      500.000000    
     395     2          47            1000.00000      500.000000    
                        48            1000.00000      500.000000    
     396     2          48            1000.00000      500.000000    
                        49            1000.00000      500.000000    
     397     2          49            1000.00000      500.000000    
                        50            1000.00000      500.000000    
     398     2          50            1000.00000      500.000000    
                        51            1000.00000      500.000000    
     399     2          51            1000.00000      500.000000    
                        52            1000.00000      500.000000    

 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2          23.2     ***
 Ansys Mechanical Enterprise Academic Research     
 01148981  VERSION=WINDOWS x64   21:23:59  MAR 11, 2024 CP=     29.641

 mk1--Transient Thermal (L5)                                                   

 

 ELEMENT  LKEY     FACE NODES       FILM COEFFICIENT      TBULK
     400     2          52            1000.00000      500.000000    
                        53            1000.00000      500.000000    
     401     2          53            1000.00000      500.000000    
                        54            1000.00000      500.000000    
     402     2          54            1000.00000      500.000000    
                        55            1000.00000      500.000000    
     403     2          55            1000.00000      500.000000    
                        56            1000.00000      500.000000    
     404     2          56            1000.00000      500.000000    
                        57            1000.00000      500.000000    
     405     2          57            1000.00000      500.000000    
                        58            1000.00000      500.000000    
     406     2          58            1000.00000      500.000000    
                        59            1000.00000      500.000000    
     407     2          59            1000.00000      500.000000    
                        60            1000.00000      500.000000    
     408     2          60            1000.00000      500.000000    
                        61            1000.00000      500.000000    
     409     2          61            1000.00000      500.000000    
                        62            1000.00000      500.000000    
     410     2          62            1000.00000      500.000000    
                        63            1000.00000      500.000000    
     411     2          63            1000.00000      500.000000    
                        64            1000.00000      500.000000    
     412     2          64            1000.00000      500.000000    
                        65            1000.00000      500.000000    
     413     2          65            1000.00000      500.000000    
                        66            1000.00000      500.000000    
     414     3          66            1000.00000      500.000000    
                         2            1000.00000      500.000000    

 Set Encoding of XML File to:ISO-8859-1

 Set Output of XML File to:
     PARM,     ,     ,     ,     ,     ,     ,     ,     ,     ,     ,     ,
         ,     ,     ,     ,     ,     ,     ,

 DATABASE WRITTEN ON FILE  parm.xml                                                                                                                                                                                                                                                            

 EXIT THE MAPDL POST1 DATABASE PROCESSOR

 

[Chandra Sekaran]

Hi Francesco,

I think the *dim command below is not right. 

*dim,bartz,TABLE,4,3,X,TEMP

It should be

*dim,bartz,table,4,3,1,x,temp  ! Must give the K dimension. You can leave it as blank (default to 1).

Similarly the other array should be 

*dim,bulk,TABLE,50,,,X

 

*DIM, Par, Type, IMAX, JMAX, KMAX, Var1, Var2, Var3, CSYSID

[Francesco Miccoli]

I can now see that something has changed, using:

*dim,bartz,TABLE,50,61,1,X,TEMP
*taxis,bartz(1),1,0.13,0.130976,0.131951,0.132927,0.133902,0.134878,...,0.185
*taxis,bartz(1),2,0,50,100,150,200,250,300,350,400,450,...,3000

and 

*dim,bulk,TABLE,50,1,1,X
*taxis,bulk(1),1,0.13,0.130976,0.131951,0.132927,0.133902,0.134878,...,0.185

I get the following result

ELEMENT LKEY FACE NODES FILM COEFFICIENT TBULK
350 2 1 8217.95590 2663.39620
3 8217.95590 2663.39620
351 2 3 8217.95590 2663.39620
4 8217.95590 2663.39620
352 2 4 8217.95590 2663.39620
5 8217.95590 2663.39620
353 2 5 8217.95590 2663.39620
6 8217.95590 2663.39620
354 2 6 8217.95590 2663.39620
7 8217.95590 2663.39620
355 2 7 8217.95590 2663.39620
8 8217.95590 2663.39620
356 2 8 8217.95590 2663.39620
9 8217.95590 2663.39620
357 2 9 8217.95590 2663.39620
10 8217.95590 2663.39620
358 2 10 8217.95590 2663.39620
11 8217.95590 2663.39620
359 2 11 8217.95590 2663.39620
12 8217.95590 2663.39620
360 2 12 8217.95590 2663.39620
13 8217.95590 2663.39620
361 2 13 8217.95590 2663.39620
14 8217.95590 2663.39620
362 2 14 8217.95590 2663.39620
15 8217.95590 2663.39620
363 2 15 8217.95590 2663.39620
16 8217.95590 2663.39620
364 2 16 8217.95590 2663.39620
17 8217.95590 2663.39620
365 2 17 8217.95590 2663.39620
18 8217.95590 2663.39620
366 2 18 8217.95590 2663.39620
19 8217.95590 2663.39620
367 2 19 8217.95590 2663.39620
20 8217.95590 2663.39620
368 2 20 8217.95590 2663.39620
21 8217.95590 2663.39620
369 2 21 8217.95590 2663.39620
22 8217.95590 2663.39620
370 2 22 8217.95590 2663.39620
23 8217.95590 2663.39620
371 2 23 8217.95590 2663.39620
24 8217.95590 2663.39620
372 2 24 8217.95590 2663.39620
25 8217.95590 2663.39620
373 2 25 8217.95590 2663.39620
26 8217.95590 2663.39620
374 2 26 8217.95590 2663.39620
27 8217.95590 2663.39620

*** MAPDL - ENGINEERING ANALYSIS SYSTEM RELEASE 2023 R2 23.2 ***
Ansys Mechanical Enterprise Academic Research
01148981 VERSION=WINDOWS x64 09:14:44 MAR 12, 2024 CP= 60.531

mk1--Transient Thermal (L5)




ELEMENT LKEY FACE NODES FILM COEFFICIENT TBULK
375 2 27 8217.95590 2663.39620
28 8217.95590 2663.39620
376 2 28 8217.95590 2663.39620
29 8217.95590 2663.39620
377 2 29 8217.95590 2663.39620
30 8217.95590 2663.39620
378 2 30 8217.95590 2663.39620
31 8217.95590 2663.39620
379 2 31 8217.95590 2663.39620
32 8217.95590 2663.39620
380 2 32 8217.95590 2663.39620
33 8217.95590 2663.39620
381 2 33 8217.95590 2663.39620
34 8217.95590 2663.39620
382 2 34 8217.95590 2663.39620
35 8217.95590 2663.39620
383 2 35 8217.95590 2663.39620
36 8217.95590 2663.39620
384 2 36 8217.95590 2663.39620
37 8217.95590 2663.39620
385 2 37 8217.95590 2663.39620
38 8217.95590 2663.39620
386 2 38 8217.95590 2663.39620
39 8217.95590 2663.39620
387 2 39 8217.95590 2663.39620
40 8217.95590 2663.39620
388 2 40 8217.95590 2663.39620
41 8217.95590 2663.39620
389 2 41 8217.95590 2663.39620
42 8217.95590 2663.39620
390 2 42 8217.95590 2663.39620
43 8217.95590 2663.39620
391 2 43 8217.95590 2663.39620
44 8217.95590 2663.39620
392 2 44 8217.95590 2663.39620
45 8217.95590 2663.39620
393 2 45 8217.95590 2663.39620
46 8217.95590 2663.39620
394 2 46 8217.95590 2663.39620
47 8217.95590 2663.39620
395 2 47 8217.95590 2663.39620
48 8217.95590 2663.39620
396 2 48 8217.95590 2663.39620
49 8217.95590 2663.39620
397 2 49 8217.95590 2663.39620
50 8217.95590 2663.39620
398 2 50 8217.95590 2663.39620
51 8217.95590 2663.39620
399 2 51 8217.95590 2663.39620
52 8217.95590 2663.39620

*** MAPDL - ENGINEERING ANALYSIS SYSTEM RELEASE 2023 R2 23.2 ***
Ansys Mechanical Enterprise Academic Research
01148981 VERSION=WINDOWS x64 09:14:44 MAR 12, 2024 CP= 61.000

mk1--Transient Thermal (L5)




ELEMENT LKEY FACE NODES FILM COEFFICIENT TBULK
400 2 52 8217.95590 2663.39620
53 8217.95590 2663.39620
401 2 53 8217.95590 2663.39620
54 8217.95590 2663.39620
402 2 54 8217.95590 2663.39620
55 8217.95590 2663.39620
403 2 55 8217.95590 2663.39620
56 7781.48389 2666.04635
404 2 56 7781.48389 2666.04635
57 7313.97781 2668.72042
405 2 57 7313.97781 2668.72042
58 6883.48184 2670.97915
406 2 58 6883.48184 2670.97915
59 6498.70836 2672.78417
407 2 59 6498.70836 2672.78417
60 6146.30347 2674.31048
408 2 60 6146.30347 2674.31048
61 5818.84277 2675.63454
409 2 61 5818.84277 2675.63454
62 5515.72008 2676.77244
410 2 62 5515.72008 2676.77244
63 5243.28918 2677.69982
411 2 63 5243.28918 2677.69982
64 4988.25853 2678.52000
412 2 64 4988.25853 2678.52000
65 4749.60914 2679.24255
413 2 65 4749.60914 2679.24255
66 4529.84968 2679.85958
414 3 66 4529.84968 2679.85958
2 4328.79584 2680.38574

Still there are some nodes that are not correctly interpolated, but I can't figure out why some are and some are not!

[Francesco Miccoli]

Do you have any idea why it could be interpolating on some nodes only?

[dlooman]

Hard to say.  Is it the film coefficient or tbulk that isn't interpolated?  Did you check your table input in the APLD gui?

[Francesco Miccoli]

Both are not interpolated for most nodes, for some nodes (see previous comment) they are though, even if ALL the nodes are in the X and TEMP range of the table...
Regarding the APDL gui I am having issues importing the data (if not element by element). The values of the table though are generated on matlab and their plot is correct.

[dlooman]

The APDL gui would tell you that you APDL input is correct.  All you need to do is cut and paste the commands that create the tables into the input window.  You don't need to have any model active.

[Francesco Miccoli]

I did that, pasted the whole command and got only this:

so I guess the commands are right, but I still have the issue that some nodes are interpolated and some not

[dlooman]

I didn't want you to include any of the other commands in the cut and paste.  Just the table definition.  After cutting and pasting them in you need to pick on Parameters in the top tool bar and then Array Parameters > from the drop down menu.  Then Define/Edit.  You should see you array name in a list that you can pick on.

[Francesco Miccoli]

This is it. I don't understand why there are values e-31...

[dlooman]

That means there is something wrong with your *taxis commands.

[Francesco Miccoli]

from the commands "guide" : 
*TAXIS, ParmLoc, nAxis, Val1, Val2, Val3, Val4, Val5, Val6, Val7, Val8, Val9, Val10

for my command I used: 

*dim,bartz,TABLE,50,61,1,X,TEMP

*taxis,bartz(1),1,0.107,0.108088,0.109176,...

*taxis,bartz(1),2,0,50,100,150,200,...

the only place I could see an issue is the bartz(1) part, but I wouldn't know how to correct it

[dlooman]

You can only input 10 values at a time.  How did you enter all 50 or 61 values?