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March 10, 2024 at 10:03 pmFrancesco MiccoliSubscriber
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)= ...Â*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%Âbut even though the simulation runs without errors the results I obtain do not make sense. What am I doing wrong?Thanks in advance, Francesco -
March 11, 2024 at 2:07 pmChandra SekaranAnsys Employee
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.
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March 11, 2024 at 2:53 pmFrancesco MiccoliSubscriber
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.
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March 11, 2024 at 3:18 pmChandra SekaranAnsys Employee
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?
Â
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March 11, 2024 at 3:27 pmdloomanAnsys Employee
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),4,0,1Â! Time 0 valueshc_vals(1,1,1,1)=1,2hc_vals(1,2,1,1)=3,4Âhc_vals(1,1,2,1)=5,6hc_vals(1,2,2,1)=7,8Â! Time 1 valueshc_vals(1,1,1,2)=11,21hc_vals(1,2,1,2)=31,41Âhc_vals(1,1,2,2)=51,61hc_vals(1,2,2,2)=71,81Â*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),4,0,1Â! Time 0 valuestb_vals(1,1,1,1)=10,200tb_vals(1,2,1,1)=30,400Âtb_vals(1,1,2,1)=50,60tb_vals(1,2,2,1)=70,80Â! Time 1 valuestb_vals(1,1,1,2)=110,210tb_vals(1,2,1,2)=310,410Âtb_vals(1,1,2,2)=510,610tb_vals(1,2,2,2)=710,810Ânsel,s,extsf,all,conv,%hc_vals%,%tb_vals%nsel,all-
March 11, 2024 at 3:39 pmFrancesco MiccoliSubscriber
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?
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March 11, 2024 at 3:56 pmdloomanAnsys Employee
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. Â
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March 11, 2024 at 4:00 pmFrancesco MiccoliSubscriber
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?
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March 11, 2024 at 4:51 pmChandra SekaranAnsys Employee
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.
Â
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March 11, 2024 at 6:15 pmFrancesco MiccoliSubscriber
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) = 1000bartz(1,2) = 1000
bartz(2,2) = 10000
bartz(3,2) = 10000
bartz(4,2) = 1000bartz(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) = 500sf,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) = 1000bartz(1,2) = 1000
bartz(2,2) = 10000
bartz(3,2) = 10000
bartz(4,2) = 1000bartz(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) = 500sf,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?
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March 11, 2024 at 7:29 pmFrancesco MiccoliSubscriber
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
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March 11, 2024 at 8:25 pmChandra SekaranAnsys Employee
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.
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March 11, 2024 at 8:40 pmFrancesco MiccoliSubscriber
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 currentÂ
 displacement and force boundary conditions in the database with the   Â
 values from the results file for that load set.  Note that any     Â
 subsequent solutions will use these values unless action is taken to  Â
 either SAVE the current values or not overwrite them (/EXIT,NOSAVE).  Â
 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  Â
 TITLE= mk1--Transient Thermal (L5)                       Â SELECT    COMPONENT NOZZLE_SELECTION                                                                                                                        Â
 LIST ALL SELECTED NODES.  DSYS=    0
 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2      23.2   ***
 Ansys Mechanical Enterprise Academic Research   Â
 01148981  VERSION=WINDOWS x64  21:23:59  MAR 11, 2024 CP=   26.594 mk1--Transient Thermal (L5)                          Â
Â
  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   Â
 01148981  VERSION=WINDOWS x64  21:23:59  MAR 11, 2024 CP=   27.531 mk1--Transient Thermal (L5)                          Â
Â
  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   Â
 01148981  VERSION=WINDOWS x64  21:23:59  MAR 11, 2024 CP=   28.703 mk1--Transient Thermal (L5)                          Â
Â
  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  Â
 necessarily the values corresponding to the current results data set.  Â
 Tabular boundary conditions, however, do list values corresponding to  Â
 the current results set.                        Â LIST NODAL SURFACE LOAD CONV FOR ALL SELECTED NODES
 *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2      23.2   ***
 Ansys Mechanical Enterprise Academic Research   Â
 01148981  VERSION=WINDOWS x64  21:23:59  MAR 11, 2024 CP=   29.406 mk1--Transient Thermal (L5)                          Â
Â
 ELEMENT  LKEY   FACE NODES    FILM COEFFICIENT    TBULK
   350   2      1       1000.00000    500.000000  Â
             3       1000.00000    500.000000  Â
   351   2      3       1000.00000    500.000000  Â
             4       1000.00000    500.000000  Â
   352   2      4       1000.00000    500.000000  Â
             5       1000.00000    500.000000  Â
   353   2      5       1000.00000    500.000000  Â
             6       1000.00000    500.000000  Â
   354   2      6       1000.00000    500.000000  Â
             7       1000.00000    500.000000  Â
   355   2      7       1000.00000    500.000000  Â
             8       1000.00000    500.000000  Â
   356   2      8       1000.00000    500.000000  Â
             9       1000.00000    500.000000  Â
   357   2      9       1000.00000    500.000000  Â
            10       1000.00000    500.000000  Â
   358   2      10       1000.00000    500.000000  Â
            11       1000.00000    500.000000  Â
   359   2      11       1000.00000    500.000000  Â
            12       1000.00000    500.000000  Â
   360   2      12       1000.00000    500.000000  Â
            13       1000.00000    500.000000  Â
   361   2      13       1000.00000    500.000000  Â
            14       1000.00000    500.000000  Â
   362   2      14       1000.00000    500.000000  Â
            15       1000.00000    500.000000  Â
   363   2      15       1000.00000    500.000000  Â
            16       1000.00000    500.000000  Â
   364   2      16       1000.00000    500.000000  Â
            17       1000.00000    500.000000  Â
   365   2      17       1000.00000    500.000000  Â
            18       1000.00000    500.000000  Â
   366   2      18       1000.00000    500.000000  Â
            19       1000.00000    500.000000  Â
   367   2      19       1000.00000    500.000000  Â
            20       1000.00000    500.000000  Â
   368   2      20       1000.00000    500.000000  Â
            21       1000.00000    500.000000  Â
   369   2      21       1000.00000    500.000000  Â
            22       1000.00000    500.000000  Â
   370   2      22       1000.00000    500.000000  Â
            23       1000.00000    500.000000  Â
   371   2      23       1000.00000    500.000000  Â
            24       1000.00000    500.000000  Â
   372   2      24       1000.00000    500.000000  Â
            25       1000.00000    500.000000  Â
   373   2      25       1000.00000    500.000000  Â
            26       1000.00000    500.000000  Â
   374   2      26       1000.00000    500.000000  Â
            27       1000.00000    500.000000  Â *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2      23.2   ***
 Ansys Mechanical Enterprise Academic Research   Â
 01148981  VERSION=WINDOWS x64  21:23:59  MAR 11, 2024 CP=   29.406 mk1--Transient Thermal (L5)                          Â
Â
 ELEMENT  LKEY   FACE NODES    FILM COEFFICIENT    TBULK
   375   2      27       1000.00000    500.000000  Â
            28       1000.00000    500.000000  Â
   376   2      28       1000.00000    500.000000  Â
            29       1000.00000    500.000000  Â
   377   2      29       1000.00000    500.000000  Â
            30       1000.00000    500.000000  Â
   378   2      30       1000.00000    500.000000  Â
            31       1000.00000    500.000000  Â
   379   2      31       1000.00000    500.000000  Â
            32       1000.00000    500.000000  Â
   380   2      32       1000.00000    500.000000  Â
            33       1000.00000    500.000000  Â
   381   2      33       1000.00000    500.000000  Â
            34       1000.00000    500.000000  Â
   382   2      34       1000.00000    500.000000  Â
            35       1000.00000    500.000000  Â
   383   2      35       1000.00000    500.000000  Â
            36       1000.00000    500.000000  Â
   384   2      36       1000.00000    500.000000  Â
            37       1000.00000    500.000000  Â
   385   2      37       1000.00000    500.000000  Â
            38       1000.00000    500.000000  Â
   386   2      38       1000.00000    500.000000  Â
            39       1000.00000    500.000000  Â
   387   2      39       1000.00000    500.000000  Â
            40       1000.00000    500.000000  Â
   388   2      40       1000.00000    500.000000  Â
            41       1000.00000    500.000000  Â
   389   2      41       1000.00000    500.000000  Â
            42       1000.00000    500.000000  Â
   390   2      42       1000.00000    500.000000  Â
            43       1000.00000    500.000000  Â
   391   2      43       1000.00000    500.000000  Â
            44       1000.00000    500.000000  Â
   392   2      44       1000.00000    500.000000  Â
            45       1000.00000    500.000000  Â
   393   2      45       1000.00000    500.000000  Â
            46       1000.00000    500.000000  Â
   394   2      46       1000.00000    500.000000  Â
            47       1000.00000    500.000000  Â
   395   2      47       1000.00000    500.000000  Â
            48       1000.00000    500.000000  Â
   396   2      48       1000.00000    500.000000  Â
            49       1000.00000    500.000000  Â
   397   2      49       1000.00000    500.000000  Â
            50       1000.00000    500.000000  Â
   398   2      50       1000.00000    500.000000  Â
            51       1000.00000    500.000000  Â
   399   2      51       1000.00000    500.000000  Â
            52       1000.00000    500.000000  Â *** MAPDL - ENGINEERING ANALYSIS SYSTEM  RELEASE 2023 R2      23.2   ***
 Ansys Mechanical Enterprise Academic Research   Â
 01148981  VERSION=WINDOWS x64  21:23:59  MAR 11, 2024 CP=   29.641 mk1--Transient Thermal (L5)                          Â
Â
 ELEMENT  LKEY   FACE NODES    FILM COEFFICIENT    TBULK
   400   2      52       1000.00000    500.000000  Â
            53       1000.00000    500.000000  Â
   401   2      53       1000.00000    500.000000  Â
            54       1000.00000    500.000000  Â
   402   2      54       1000.00000    500.000000  Â
            55       1000.00000    500.000000  Â
   403   2      55       1000.00000    500.000000  Â
            56       1000.00000    500.000000  Â
   404   2      56       1000.00000    500.000000  Â
            57       1000.00000    500.000000  Â
   405   2      57       1000.00000    500.000000  Â
            58       1000.00000    500.000000  Â
   406   2      58       1000.00000    500.000000  Â
            59       1000.00000    500.000000  Â
   407   2      59       1000.00000    500.000000  Â
            60       1000.00000    500.000000  Â
   408   2      60       1000.00000    500.000000  Â
            61       1000.00000    500.000000  Â
   409   2      61       1000.00000    500.000000  Â
            62       1000.00000    500.000000  Â
   410   2      62       1000.00000    500.000000  Â
            63       1000.00000    500.000000  Â
   411   2      63       1000.00000    500.000000  Â
            64       1000.00000    500.000000  Â
   412   2      64       1000.00000    500.000000  Â
            65       1000.00000    500.000000  Â
   413   2      65       1000.00000    500.000000  Â
            66       1000.00000    500.000000  Â
   414   3      66       1000.00000    500.000000  Â
             2       1000.00000    500.000000  Â Set Encoding of XML File to:ISO-8859-1
 Set Output of XML File to:
   PARM,   ,   ,   ,   ,   ,   ,   ,   ,   ,   ,   ,
     ,   ,   ,   ,   ,   ,   , DATABASE WRITTEN ON FILE  parm.xml                                                                                                                              Â
 EXIT THE MAPDL POST1 DATABASE PROCESSOR
Â
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March 11, 2024 at 10:51 pmChandra SekaranAnsys Employee
Hi Francesco,
I think the *dim command below is not right.Â
*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 beÂ
*dim,bulk,TABLE,50,,,X
Â
*DIM,Â
Par
,ÂType
,ÂIMAX
,ÂJMAX
,ÂKMAX
,ÂVar1
,ÂVar2
,ÂVar3
,ÂCSYSID
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March 12, 2024 at 8:36 amFrancesco MiccoliSubscriber
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,...,3000andÂ
*dim,bulk,TABLE,50,1,1,X
*taxis,bulk(1),1,0.13,0.130976,0.131951,0.132927,0.133902,0.134878,...,0.185I 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 2680.38574Still there are some nodes that are not correctly interpolated, but I can't figure out why some are and some are not!
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March 13, 2024 at 5:56 pmFrancesco MiccoliSubscriber
Do you have any idea why it could be interpolating on some nodes only?
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March 12, 2024 at 2:56 pmdloomanAnsys Employee
Hard to say. Is it the film coefficient or tbulk that isn't interpolated? Did you check your table input in the APLD gui?
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March 12, 2024 at 3:19 pmFrancesco MiccoliSubscriber
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.
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March 13, 2024 at 6:02 pmdloomanAnsys Employee
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.
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March 14, 2024 at 1:41 pm
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March 14, 2024 at 1:52 pmdloomanAnsys Employee
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.
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March 14, 2024 at 2:02 pm
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March 14, 2024 at 2:08 pmdloomanAnsys Employee
That means there is something wrong with your *taxis commands.
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March 14, 2024 at 2:21 pmFrancesco MiccoliSubscriber
from the commands "guide" :Â
*TAXIS,ParmLoc
,nAxis
,Val1
,Val2
,Val3
,Val4
,Val5
,Val6
,Val7
,Val8
,Val9
,Val10
for my command I used:Â
*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
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March 14, 2024 at 2:36 pmdloomanAnsys Employee
You can only input 10 values at a time. How did you enter all 50 or 61 values?
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- The topic ‘MAPDL convection load with variable film coefficient and bulk temperature’ is closed to new replies.
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