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Thermal Solver
Contains thermal solver related guides, such as the TMG reference manual, thermal API guide, and error message list.
Thermal solver reference
Describes the format and contents of the thermal solver's input and output files
Thermal solver modules
The following table describes the thermal solver modules that are executed during the solving process. This section also consists of additional information about some of these modules.
ANS2TMG module information
ANS2TMG translates Ansys models into thermal solver input files by merging Ansys and thermal solver data, creating necessary boundary conditions, and converting thermal elements and material properties.

Thermal Solver
Contains thermal solver related guides, such as the TMG reference manual, thermal API guide, and error message list.
- Thermal solver guides
  Maya HTT's thermal solver is included in Simcenter 3D and in Simcenter Femap. This page contains links to thermal solver guides, which help you understand how the thermal solver works.
- Thermal solver reference
  Describes the format and contents of the thermal solver's input and output files
  - Introduction
    In most situations, a thermal model can be defined and solved directly within your CAE software. The thermal model is built using the software's interface, and the results can then be displayed and analyzed using its built-in post-processing tools.
  - Thermal solver input cards
    To access thermal solver features outside your CAE software, you must manually input instructions and data into the thermal solver’s input file also known as the data deck using any text editor.
  - Thermal solver input and output files
    The thermal solver generates several data exchange files during the solve when using supported CAE software.
  - Thermal solver modules
    The following table describes the thermal solver modules that are executed during the solving process. This section also consists of additional information about some of these modules.
    - ANS2TMG module information
      ANS2TMG translates Ansys models into thermal solver input files by merging Ansys and thermal solver data, creating necessary boundary conditions, and converting thermal elements and material properties.
    - GRAYB module information
      The GRAYB module crates the radiative conductances, the IR, solar spectrum, and gray body view factor matrices.
    - HEMIVIEW module information
      The HEMIVIEW module calculates diffuse blackbody view factors using the hemicube method, which allows computer graphics hardware to accelerate the calculations.
    - MEREL module information
      The MEREL module performers the model condensation by element merging or renumbering, automatic combination, substructuring, and model thinning.
    - NEVADA module information
      The NEVADA module converts a NEVADA input deck into an equivalent I-deas Universal file.
    - POWER module information
      The POWER module calculates IR and solar spectrum radiative heat loads from the orbital view factors, heat flux view factors, and view factors of the VUFF file.
    - REFORM module information
      The REFORM module transforms the conductance-capacitance model from the MODLCF file into SINDA or ESATAN formats, or the geometry model into TRASYS or NEVADA formats. The formatted models are written in the FMODLF file.
    - TMG2ANS module information
      The TMG2ANS module translates the TMG node temperature results from GTEMPF to ANSYS version 5 input files.
    - VUFAC module information
      The VUFAC module calculates view factors, orbital view factors (solar view factors, albedo view factors, Earth view factors), heat flux view factors, view factor for axisymmetric modeling with plane stress, and thermal couplings.
    - Comparison of view factor computation modules
      This page compares VFRTGPU to the HEMIVIEW and VUFAC modules.
    - Comparison between CONDN and COND modules
      The following list provides a brief comparison between the COND and CONDN conduction modules.
  - Post-processing libraries
    The thermal solver provides the following post-processing libraries for generating results files.
  - Thermal solver bibliography
    The following bibliography lists all sources used to explain how the thermal solver works.
- Thermal solver theory
  Describes the theory and methods of the thermal solver.
- Thermal solver API
  Allows you to create or add functionality to enhance the thermal solver capabilities.
- Thermal solver error message list
  Lists solver messages that the thermal solver generates to communicate issues with the model or the solve.

ANS2TMG module information

ANS2TMG translates Ansys models into thermal solver input files by merging Ansys and thermal solver data, creating necessary boundary conditions, and converting thermal elements and material properties.

ANS2TMG accepts Ansys version 5 FE model in ASCII file format, which can be generated from Ansys by issuing the CDWRITE command.

For Ansys version 5.5 you should include the UNBLOCKED option with the CDWRITE command.

To translate an Ansys FE model file into TMG input file format:

Create a TMG format include file, containing boundary conditions, analysis control and other data. Call this file inpf.inc.
Name your Ansys input file file.cdb.
Run the TMG Executive Menu from the operating system, and select the RA switch. This operation creates a TMG input file INPF and run it.

To create TMG geometry interpolation file in the VUFF format for temperature mapping post-processing by the TMGINT module, select the BI switch in the TMG Executive Menu.

ANS2TMG translates the following Ansys FE model identities into TMG FD model:

Ansys FE nodes are translated into TMG nodes.
Ansys thermal elements are translated into TMG elements. The Ansys element types translated are: SURF19, SURF22, LINK32, LINK33, PLANE35, SHELL57, SELL63, PLANE67, LINK68, PLANE77, SOLID70, MASS71, SOLID87, and SOLID90.
SURF19 and SURF22 are translated only when temperature has been defined as one of their degrees of freedom.
The extra nodes from surface effect elements and higher order elements are ignored.
Ansys thermal material property data are translated into TMG Card 9 MAT cards. The material properties translated are: density DENS, specific heat C, thermal conductivities KXX, KYY, and KZZ, and radiation emissivity EMIS. TMG automatically assigns a default solar absorptivity of -1E6 for each MAT card.

For temperature-dependent material properties corresponding Card 9 TABTYPE and TABDATA cards are generated. Thermal conductivities, C, and EMIS are translated into corresponding TABTYPE Card KTHERM, CPP and E codes. Density is always assumed to be constant.

Ansys real constants are translated into TMG Card 9 PROP Physical Property cards.