TAGGED: #thermal-radiation, heat-transfer, transient
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July 16, 2024 at 7:50 pmRishi YadavSubscriber
I am trying to simulate the transient heat analysis, but I am getting an error, 'An error occurred inside the SOLVER module: Enclosure type Perfect was incorrectly chosen in some Surface to Surface Radiation objects'.
The initial temperatures are 1400 C, and 300 C for different parts. Had heat flux as heating source and radiation data. Since inside the chamber is vacuum, so I choose surface to surface radiation and chose enclosure type as perfect. I am not sure, why there is an error. Please guide.
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July 19, 2024 at 12:14 pmSampat KumarAnsys Employee
Hi
Will you please try to open the solver output file and let me what is the actual error message there? Is there any shell body in the model?
Best Regards,
Sampat -
July 19, 2024 at 6:15 pmRishi YadavSubscriber
Solver Output
Ansys Mechanical Enterprise Academic Research
*------------------------------------------------------------------*
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***** MAPDL COMMAND LINE ARGUMENTS *****
BATCH MODE REQUESTED (-b) = NOLIST
INPUT FILE COPY MODE (-c) = COPY
SHARED MEMORY PARALLEL REQUESTED
SINGLE PROCESS WITH 24 THREADS REQUESTED
TOTAL OF 24 CORES REQUESTED
INPUT FILE NAME = D:\Ansys Rishi\Ansys Simulations\5\_ProjectScratch\ScrD250\dummy.dat
OUTPUT FILE NAME = D:\Ansys Rishi\Ansys Simulations\5\_ProjectScratch\ScrD250\solve.out
START-UP FILE MODE = NOREAD
STOP FILE MODE = NOREAD
RELEASE= 2023 R1 BUILD= 23.1 UP20221128 VERSION=WINDOWS x64
CURRENT JOBNAME=file 13:22:18 JUL 19, 2024 CP= 0.125
PARAMETER _DS_PROGRESS = 999.0000000
/INPUT FILE= ds.dat LINE= 0
DO NOT WRITE ELEMENT RESULTS INTO DATABASE
*GET _WALLSTRT FROM ACTI ITEM=TIME WALL VALUE= 13.3716667
TITLE=
5--Transient Thermal (C5)
ACT Extensions:
LSDYNA, 2023.1
5f463412-bd3e-484b-87e7-cbc0a665e474, wbex
/COM, AdditiveWizard, 2023.1
d670da30-b684-4a76-8cae-363c855c1121, wbex
/COM, ANSYSMotion, 2023.1
20180725-3f81-49eb-9f31-41364844c769, wbex
SET PARAMETER DIMENSIONS ON _WB_PROJECTSCRATCH_DIR
TYPE=STRI DIMENSIONS= 248 1 1
PARAMETER _WB_PROJECTSCRATCH_DIR(1) = D:\Ansys Rishi\Ansys Simulations\5\_ProjectScratch\ScrD250\
SET PARAMETER DIMENSIONS ON _WB_SOLVERFILES_DIR
TYPE=STRI DIMENSIONS= 248 1 1
PARAMETER _WB_SOLVERFILES_DIR(1) = D:\Ansys Rishi\Ansys Simulations\5\5_files\dp0\SYS-2\MECH\
SET PARAMETER DIMENSIONS ON _WB_USERFILES_DIR
TYPE=STRI DIMENSIONS= 248 1 1
PARAMETER _WB_USERFILES_DIR(1) = D:\Ansys Rishi\Ansys Simulations\5\5_files\user_files\
--- Data in consistent NMM units. See Solving Units in the help system for more
MPA UNITS SPECIFIED FOR INTERNAL
LENGTH = MILLIMETERS (mm)
MASS = TONNE (Mg)
TIME = SECONDS (sec)
TEMPERATURE = CELSIUS (C)
TOFFSET = 273.0
FORCE = NEWTON (N)
HEAT = MILLIJOULES (mJ)
INPUT UNITS ARE ALSO SET TO MPA
*** MAPDL - ENGINEERING ANALYSIS SYSTEM RELEASE 2023 R1 23.1 ***
Ansys Mechanical Enterprise Academic Research
00214406 VERSION=WINDOWS x64 13:22:18 JUL 19, 2024 CP= 0.234
5--Transient Thermal (C5)
***** MAPDL ANALYSIS DEFINITION (PREP7) *****
*********** Nodes for the whole assembly ***********
*********** Elements for Body 1 "Q10_Build_Table_(Rounded corners)" ***********
*********** Elements for Body 2 "Q10_tungsten_Disk" ***********
*********** Elements for Body 3 "powder layer" ***********
*********** Elements for Body 4 "Q10_powder_spread-1" ***********
*********** Elements for Body 5 "Q10_complete heat shield" ***********
*********** Send User Defined Coordinate System(s) ***********
*********** Send Materials ***********
*** WARNING *** CP = 6.922 TIME= 13:22:19
The temperature-dependent secant coefficient of thermal expansion for
material 1 includes a temperature point of reference temperature (with
a tolerance of 1 degree). This data is ignored for the MPAMOD command
operation to avoid a numerical singularity.
*** WARNING *** CP = 6.922 TIME= 13:22:19
The temperature-dependent secant coefficient of thermal expansion for
material 5 includes a temperature point of reference temperature (with
a tolerance of 1 degree). This data is ignored for the MPAMOD command
operation to avoid a numerical singularity.
*********** Create Contact "Contact Region" ***********
Real Constant Set For Above Contact Is 7 & 6
*********** Create Contact "Contact Region 3" ***********
Real Constant Set For Above Contact Is 9 & 8
*********** Create Contact "Contact Region 4" ***********
Real Constant Set For Above Contact Is 11 & 10
*********** Create Contact "Contact Region 5" ***********
Real Constant Set For Above Contact Is 13 & 12
*********** Define Temperature Constraint ***********
*********** Define Temperature Constraint ***********
*********** Define Temperature Constraint ***********
*********** Create "Heat Flux" ***********
*********** Create "ToSurface(Closed)" Radiation ***********
*********** Create "ToSurface(Closed)" Radiation ***********
***************** Define Uniform Initial temperature ***************
***** ROUTINE COMPLETED ***** CP = 8.422
--- Number of total nodes = 104159
--- Number of contact elements = 3805
--- Number of spring elements = 0
--- Number of bearing elements = 0
--- Number of solid elements = 49733
--- Number of condensed parts = 0
--- Number of total elements = 53538
*GET _WALLBSOL FROM ACTI ITEM=TIME WALL VALUE= 13.3719444
****************************************************************************
************************* SOLUTION ********************************
****************************************************************************
***** MAPDL SOLUTION ROUTINE *****
PERFORM A TRANSIENT ANALYSIS
THIS WILL BE A NEW ANALYSIS
STEP BOUNDARY CONDITION KEY= 1
CONTACT INFORMATION PRINTOUT LEVEL 1
DO NOT SAVE ANY RESTART FILES AT ALL
Use Full Nonlinear Thermal Transient Solution
NLHIST: ADDED NODAL RESULTS HISTORY FOR:
NAME = MAX_TEMP
ITEM/COMP = TEMPMAX
NODE = 0
NLHIST: ADDED NODAL RESULTS HISTORY FOR:
NAME = MIN_TEMP
ITEM/COMP = TEMPMIN
NODE = 0
********* Initial Time Increment Check And Fourier Modulus *********
Specified Initial Time Increment: 0.1
Estimated Increment Needed, le*le/alpha, Body 1: 7.4608
Estimated Increment Needed, le*le/alpha, Body 2: 0.543679
Estimated Increment Needed, le*le/alpha, Body 3: 0.0288621
Estimated Increment Needed, le*le/alpha, Body 4: 2.24448
Estimated Increment Needed, le*le/alpha, Body 5: 0.98259
****************************************************
******************* SOLVE FOR LS 1 OF 1 ****************
SPECIFIED CONSTRAINT TEMP FOR PICKED NODES
REAL= 1400.00000 IMAG= 0.00000000
SPECIFIED CONSTRAINT TEMP FOR PICKED NODES
REAL= 300.000000 IMAG= 0.00000000
SPECIFIED CONSTRAINT TEMP FOR PICKED NODES
REAL= 300.000000 IMAG= 0.00000000
SELECT FOR ITEM=TYPE COMPONENT=
IN RANGE 14 TO 14 STEP 1
53 ELEMENTS (OF 53538 DEFINED) SELECTED BY ESEL COMMAND.
SELECT ALL NODES HAVING ANY ELEMENT IN ELEMENT SET.
182 NODES (OF 104159 DEFINED) SELECTED FROM
53 SELECTED ELEMENTS BY NSLE COMMAND.
GENERATE SURFACE LOAD HFLU ON SURFACE DEFINED BY ALL SELECTED NODES
ACCORDING TO TABLE PARAMETER = _LOADVARI75
NUMBER OF HFLU ELEMENT FACE LOADS STORED = 53
ALL SELECT FOR ITEM=NODE COMPONENT=
IN RANGE 1 TO 104159 STEP 1
104159 NODES (OF 104159 DEFINED) SELECTED BY NSEL COMMAND.
ALL SELECT FOR ITEM=ELEM COMPONENT=
IN RANGE 1 TO 86886 STEP 1
53538 ELEMENTS (OF 53538 DEFINED) SELECTED BY ESEL COMMAND.
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 6 KVAL = 1
ACCORDING TO TABLE PARAMETER = _RADVARI65
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 6 KVAL = 2
VALUES = 1.0000 1.0000 1.0000 1.0000
ALL SELECT FOR ITEM=NODE COMPONENT=
IN RANGE 1 TO 104159 STEP 1
104159 NODES (OF 104159 DEFINED) SELECTED BY NSEL COMMAND.
ALL SELECT FOR ITEM=ELEM COMPONENT=
IN RANGE 1 TO 86886 STEP 1
53538 ELEMENTS (OF 53538 DEFINED) SELECTED BY ESEL COMMAND.
ENCLOSURE= 1 VIEWFACTOR SCALE METHOD = 1
ITERATIONS = 100
TOLERANCE = 1.000000047E-03
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 1 KVAL = 1
ACCORDING TO TABLE PARAMETER = _RADVARI79
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 1 KVAL = 2
VALUES = 1.0000 1.0000 1.0000 1.0000
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 2 KVAL = 1
ACCORDING TO TABLE PARAMETER = _RADVARI79
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 2 KVAL = 2
VALUES = 1.0000 1.0000 1.0000 1.0000
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 3 KVAL = 1
ACCORDING TO TABLE PARAMETER = _RADVARI79
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 3 KVAL = 2
VALUES = 1.0000 1.0000 1.0000 1.0000
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 4 KVAL = 1
ACCORDING TO TABLE PARAMETER = _RADVARI79
SPECIFIED SURFACE LOAD RDSF FOR ALL PICKED ELEMENTS LKEY = 4 KVAL = 2
VALUES = 1.0000 1.0000 1.0000 1.0000
ALL SELECT FOR ITEM=NODE COMPONENT=
IN RANGE 1 TO 104159 STEP 1
104159 NODES (OF 104159 DEFINED) SELECTED BY NSEL COMMAND.
ALL SELECT FOR ITEM=ELEM COMPONENT=
IN RANGE 1 TO 86886 STEP 1
53538 ELEMENTS (OF 53538 DEFINED) SELECTED BY ESEL COMMAND.
ALL SELECT FOR ITEM=NODE COMPONENT=
IN RANGE 1 TO 104159 STEP 1
104159 NODES (OF 104159 DEFINED) SELECTED BY NSEL COMMAND.
ALL SELECT FOR ITEM=ELEM COMPONENT=
IN RANGE 1 TO 86886 STEP 1
53538 ELEMENTS (OF 53538 DEFINED) SELECTED BY ESEL COMMAND.
PRINTOUT RESUMED BY /GOP
DO NOT USE AUTOMATIC TIME STEPPING THIS LOAD STEP
USE INITIAL TIME STEP SIZE OF 0.1000000 FOR ALL DEGREES OF FREEDOM
FOR AUTOMATIC TIME STEPPING:
USE 0.1000000 AS THE MINIMUM TIME STEP SIZE
USE 0.1000000 AS THE MAXIMUM TIME STEP SIZE
TIME= 200.00
INCLUDE TRANSIENT EFFECTS FOR ALL DEGREES OF FREEDOM THIS LOAD STEP
ERASE THE CURRENT DATABASE OUTPUT CONTROL TABLE.
WRITE ALL ITEMS TO THE DATABASE WITH A FREQUENCY OF NONE
FOR ALL APPLICABLE ENTITIES
WRITE NSOL ITEMS TO THE DATABASE WITH A FREQUENCY OF ALL
FOR ALL APPLICABLE ENTITIES
WRITE RSOL ITEMS TO THE DATABASE WITH A FREQUENCY OF ALL
FOR ALL APPLICABLE ENTITIES
WRITE EANG ITEMS TO THE DATABASE WITH A FREQUENCY OF ALL
FOR ALL APPLICABLE ENTITIES
WRITE VENG ITEMS TO THE DATABASE WITH A FREQUENCY OF ALL
FOR ALL APPLICABLE ENTITIES
WRITE FFLU ITEMS TO THE DATABASE WITH A FREQUENCY OF ALL
FOR ALL APPLICABLE ENTITIES
WRITE CONT ITEMS TO THE DATABASE WITH A FREQUENCY OF ALL
FOR ALL APPLICABLE ENTITIES
WRITE MISC ITEMS TO THE DATABASE WITH A FREQUENCY OF ALL
FOR ALL APPLICABLE ENTITIES
CONVERGENCE ON HEAT BASED ON THE NORM OF THE N-R LOAD
WITH A TOLERANCE OF 0.1000E-03 AND A MINIMUM REFERENCE VALUE OF 0.1000E-02
USING THE L2 NORM (CHECK THE SRSS VALUE)
UNDER RELAXATION FOR RADIATION FLUX= 0.10000
TOLERENCE FOR RADIOSITY FLUX= 0.00010
USING JACOBI ITERATIVE SOLVER FOR RADIOSITY SOLUTION
FOR 3D ENCLOSURES.
USING GSEIDEL ITERATIVE SOLVER FOR RADIOSITY SOLUTION
FOR 2D ENCLOSURES.
MAXIMUM NUMBER OF ITERATIONS= 1000
TOLERENCE FOR ITERATIVE SOLVER= 0.00010
RELAXATION FOR ITERATIVE SOLVER= 0.10000
HEMICUBE RESOLUTION= 10
MIN NORMALIZED DIST BEFORE AUTO SUBDIVIDE= 1.000000000E-09
SELECT COMPONENT _CM65
SELECT ALL ELEMENTS HAVING ANY NODE IN NODAL SET.
1018 ELEMENTS (OF 53538 DEFINED) SELECTED FROM
1919 SELECTED NODES BY ESLN COMMAND.
BEFORE SYMMETRIZATION:
NUMBER OF RADIATION NODES CREATED = 670
NUMBER OF RADIOSITY SURFACE ELEMENTS CREATED = 581
AFTER SYMMETRIZATION:
FULL NUMBER OF RADIATION NODES CREATED = 670
FULL NUMBER OF RADIOSITY SURFACE ELEMENTS CREATED = 581
ALL SELECT FOR ITEM=NODE COMPONENT=
IN RANGE 1 TO 104829 STEP 1
104829 NODES (OF 104829 DEFINED) SELECTED BY NSEL COMMAND.
ALL SELECT FOR ITEM=ELEM COMPONENT=
IN RANGE 1 TO 87467 STEP 1
54119 ELEMENTS (OF 54119 DEFINED) SELECTED BY ESEL COMMAND.
SELECT COMPONENT _CM79
SELECT ALL ELEMENTS HAVING ANY NODE IN NODAL SET.
46561 ELEMENTS (OF 54119 DEFINED) SELECTED FROM
28462 SELECTED NODES BY ESLN COMMAND.
BEFORE SYMMETRIZATION:
NUMBER OF RADIATION NODES CREATED = 7225
NUMBER OF RADIOSITY SURFACE ELEMENTS CREATED = 14013
AFTER SYMMETRIZATION:
FULL NUMBER OF RADIATION NODES CREATED = 7225
FULL NUMBER OF RADIOSITY SURFACE ELEMENTS CREATED = 14013
ALL SELECT FOR ITEM=NODE COMPONENT=
IN RANGE 1 TO 112054 STEP 1
112054 NODES (OF 112054 DEFINED) SELECTED BY NSEL COMMAND.
ALL SELECT FOR ITEM=ELEM COMPONENT=
IN RANGE 1 TO 101480 STEP 1
68132 ELEMENTS (OF 68132 DEFINED) SELECTED BY ESEL COMMAND.
*GET ANSINTER_ FROM ACTI ITEM=INT VALUE= 0.00000000
*IF ANSINTER_ ( = 0.00000 ) NE
0 ( = 0.00000 ) THEN
*ENDIF
***** MAPDL SOLVE COMMAND *****
CALCULATING VIEW FACTORS USING HEMICUBE METHOD
RETRIEVED 1 ENCLOSURES.
TOTAL OF 14594 DEFINED ELEMENT FACES.
# ENCLOSURE = 1 # SURFACES = 14594 # NODES = 7895
******************************************************************************
V I E W F A C T O R S M O O T H I N G
******************************************************************************
Smoothing of viewfactor matrix...
Max iterations = 100
Tolerance = 0.001
Some of the rows in the viewfactor matrix have all zeros
row sum total should be = 14590.0000
row sum total before forcing symmetry = 14587.0815
row sum total after forcing symmetry = 14587.0815
row sum total after smoothing = 14590.0002
Raw rowsum error min = -7.3418e-01
Raw rowsum error max = 2.3842e-07
Raw rowsum error mean = -1.9998e-04 +/- 9.3284e-03
Symmetric rowsum error min = -7.3418e-01
Symmetric rowsum error max = 2.3842e-07
Symmetric rowsum error mean = -1.9998e-04 +/- 5.7435e-08
Smoothed rowsum error min = -1.7881e-07
Smoothed rowsum error max = 3.5763e-07
Smoothed rowsum error mean = 1.4719e-08 +/- 5.1301e-11
number of iterations to smooth = 1
******************************************************************************
E N D O F V I E W F A C T O R S M O O T H I N G
******************************************************************************
TIME OF CALCULATION FOR THIS ENCLOSURE = 74.1875
CHECKING VIEW FACTOR SUM
*** NOTE *** CP = 110.109 TIME= 13:23:42
Some of the rows in the viewfactor matrix have all zeros for enclosure
1.
*** ERROR *** CP = 110.172 TIME= 13:23:42
No Space Temperature or Space Node specified for open Enclosure 1.
ERROR IN VIEW FACTOR CALCULATION
*** WARNING *** CP = 110.172 TIME= 13:23:42
Some radiation enclosures have viewfactor scaling. Use VFSM,STAT
command to check the status. Also note that scaling is ignored if the
viewfactor sum is <= 0.0.
NUMBER OF WARNING MESSAGES ENCOUNTERED= 3
NUMBER OF ERROR MESSAGES ENCOUNTERED= 1
***** PROBLEM TERMINATED BY INDICATED ERROR(S) OR BY END OF INPUT DATA *****
+--------------------- M A P D L S T A T I S T I C S ------------------------+
Release: 2023 R1 Build: 23.1 Update: UP20221128 Platform: WINDOWS x64
Date Run: 07/19/2024 Time: 13:23 Process ID: 19840
Operating System: Windows Server 2019 (Build: 17763)
Processor Model: Intel(R) Xeon(R) CPU E5-2660 v4 @ 2.00GHz
Compiler: Intel(R) Fortran Compiler Version 19.0.5 (Build: 20190815)
Intel(R) C/C++ Compiler Version 19.0.5 (Build: 20190815)
Intel(R) Math Kernel Library Version 2020.0.0 Product Build 20191125
BLAS Library supplied by Intel(R) MKL
Number of machines requested : 1
Total number of cores available : 56
Number of physical cores available : 28
Number of processes requested : 1
Number of threads per process requested : 24
Total number of cores requested : 24 (Shared Memory Parallel)
GPU Acceleration: Not Requested
Job Name: file
Input File: dummy.dat
Working Directory: D:\Ansys Rishi\Ansys Simulations\5\_ProjectScratch\ScrD250
Total CPU time for main thread : 84.1 seconds
Total CPU time summed for all threads : 113.5 seconds
Elapsed time spent obtaining a license : 0.9 seconds
Elapsed time spent pre-processing model (/PREP7) : 0.6 seconds
Elapsed time spent solution - preprocessing : 0.0 seconds
Elapsed time spent computing solution : 0.0 seconds
Elapsed time spent solution - postprocessing : 0.0 seconds
Elapsed time spent post-processing model (/POST1) : 0.0 seconds
Sum of memory used on all processes : 162.0 MB
Sum of memory allocated on all processes : 2112.0 MB
Physical memory available : 64 GB
Total amount of I/O written to disk : 0.0 GB
Total amount of I/O read from disk : 0.0 GB
+------------------ E N D M A P D L S T A T I S T I C S -------------------+
*-----------------------------------------------------------------------------*
| |
| RUN COMPLETED |
| |
|-----------------------------------------------------------------------------|
| |
| Ansys MAPDL 2023 R1 Build 23.1 UP20221128 WINDOWS x64 |
| |
|-----------------------------------------------------------------------------|
| |
| Database Requested(-db) 1024 MB Scratch Memory Requested 1024 MB |
| Maximum Database Used 79 MB Maximum Scratch Memory Used 83 MB |
| |
|-----------------------------------------------------------------------------|
| |
| CP Time (sec) = 113.453 Time = 13:23:42 |
| Elapsed Time (sec) = 86.000 Date = 07/19/2024 |
| |
*-----------------------------------------------------------------------------* -
July 23, 2024 at 2:20 pmSampat KumarAnsys Employee
Hi
if your model includes a shell body then apply the radiation boundary condition individually for the shell bodies. Try to run with the same enclosure number and the "close" enclosure type. I believe there's a possibility that some bodies are not covered by the radiation boundary condition enclosure, which explains why this error is occurring. Kindly verify this.
Secondly, I believe there is some leakage in the enclosure type, which is the reason you are receiving the error. if you are still unable to solve the problem even after adding all the bodies in the enclosure. The enclosure type assing "open" can be used to run it. When using the "open" enclosure type, there might be a possibility that some heat will seep into the surroundings, however, it will not affect your analysis.
Best Regards,
Sampat -
July 24, 2024 at 3:31 amRishi YadavSubscriber
There are no shell bodies. I felt there might be some leakage so I changed the heat shield with no space as shown in image below. I did try to run the simulation with open condition but it is same error. I noticed in the error it is mentionig about, 'no space tempertaure', how can that be specified?
*** ERROR *** CP = 106.672 TIME= 13:52:20
No Space Temperature or Space Node specified for open Enclosure 1.To run with eclosure type as open. Temperature is rising upto ~1450 degree celcius from 1400 degree celcius but starts decreasing after that. It should reach about 3300 degree celcius.
-
August 1, 2024 at 9:54 amSampat KumarAnsys Employee
Hi Rishi,
Thanks for your patience.As I explained, the issue is due to the lack of a properly defined or captured radiation surface in the boundary conditions. Since there are inclined plates, bodies outside the close enclosure also participate in radiation heat transfer, which might create an issue in the calculation of view factors.
It’s crucial to remember that view factors are used to calculate radiation exchange between surfaces. They represent the fraction of radiation leaving one surface that reaches another.
I would suggest splitting the body that is outside the enclosure which will help you to apply the radiation boundary condition only to the surfaces within the enclosure. I believe this will help you to resolve the issue.
Note:- After following the above procedure, you can refine the mesh.
Best Regards,
Sampat -
August 10, 2024 at 5:07 amRishi YadavSubscriber
I am getting an error with body split (image attached), and when I tried the face split, the face splitted into 4 parts. There is no body outside the enclosure. There is a build tray, on which a plate is placed on and on that plate there is a layer, which is getting heated. The process is in the vaccum. The heat shield is there (top structure) to prevent the heat loss. Radiation from heat shield is also playing a role in heating the layer. Can we connect over zoom?
-
- The topic ‘An error occurred inside the SOLVER module: Enclosure type’ is closed to new replies.
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