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Thermal-Flow
Contains general thermal and flow solver related documentation, such as the verification test cases, monthly critical fixes, DMP guide, and knowledge base articles.
Monthly critical fixes
Lists critical bugs that are fixed monthly for the thermal and flow solvers.
April 2024 critical fixes
April 2024 fixes were published on 16 April 2024. All critical fixes listed here were fixed for version 2406.0 unless otherwise noted.

Thermal-Flow
Contains general thermal and flow solver related documentation, such as the verification test cases, monthly critical fixes, DMP guide, and knowledge base articles.
- TMG thermal-flow solvers
  Maya HTT develops and maintains a thermal solver and a flow solver, which are combined into the TMG thermal-flow solvers. These solvers are included and distributed with Simcenter 3D, NX, and Simcenter Femap. Older versions of TMG thermal-flow solvers are also included in NX I-deas.
- Thermal and flow verification test cases
  Contains verification test cases for the thermal and flow solvers.
- Monthly critical fixes
  Lists critical bugs that are fixed monthly for the thermal and flow solvers.
  - Introduction
    Maya HTT strives to release the best thermal-flow solver by continually updating and fixing critical issues and releasing monthly updates to the solver. The following section lists the most critical issues fixed starting in March 2024.
  - November 2024 critical fixes
    November 2024 fixes were published on 12 November 2024.
  - October 2024 critical fixes
    October 2024 fixes were published on 23 October 2024.
  - September 2024 critical fixes
    September 2024 fixes were published on 19 September 2024.
  - August 2024 critical fixes
    August 2024 fixes were published on 21 August 2024. All critical fixes listed here were fixed for versions 2406.4, 2312.8, 2306.13 unless otherwise noted.
  - July 2024 critical fixes
    July 2024 fixes were published on 10 July 2024. All critical fixes listed here were fixed for versions 2406.2, 2312.7, 2306.12 unless otherwise noted.
  - June 2024 critical fixes
    June 2024 fixes were published on 25 June 2024. All critical fixes listed here were fixed for versions 2406.1, 2312.6, 2306.11 unless otherwise noted.
  - April 2024 critical fixes
    April 2024 fixes were published on 16 April 2024. All critical fixes listed here were fixed for version 2406.0 unless otherwise noted.
  - March 2024 critical fixes
    March 2024 fixes were published on 12 March 2024. All critical fixes listed here were fixed for versions 2406.0, 2312.4, 2306.9 unless otherwise noted.
- TMG Executive Menu
  TMG Executive Menu is a standalone application that lets you execute processes on thermal-flow files and solutions independently of Simcenter 3D or Simcenter Femap.
- Thermal and flow DMP guide
  Describes the general workflow for executing the simulation jobs using distributed memory parallel processing on clusters and the scheduler-dependent files required to submit the jobs to the scheduler.
- Thermal-flow data exchange files
  The thermal and flow solvers in Simcenter 3D and Simcenter Femap create multiple thermal-flow data exchange files described on the following page.

April 2024 critical fixes

April 2024 fixes were published on 16 April 2024. All critical fixes listed here were fixed for version 2406.0 unless otherwise noted.

Bug 87795: Incorrect flux values are computed for a model containing a combination of Solar Heating Space and Articulation simulation objects

Fixed versions: 2406.0, 2312.6

When motions are defined at specified time steps and those time steps do not correspond to any orbital time steps / angles, the code computes an orbit angle based on the specified motion time step. The function that computes these angles was wrong and did not consider partial orbits. These incorrectly computed orbit angles translated to erroneous sun vectors, and ultimately the computed flux was wrong for these time steps. This has been fixed.

User Story 87957: Modify FEM data structures in TMG to support mixed-order elements

Prior to the fix, mixed-order elements were not properly supported with the finite element implementation, i.e. mixed-order elements were treated as linear. With the correct support of mixed-order elements for the finite element implementation, smoother and more physical temperature profiles can be seen around the regions where these elements exist.

User Story 88763: Update OSMESA (Mesa 3D) library to v23.0.4

The Hemiview module on Linux uses the OSMesa library which has been updated from version 10.6.9 to version 23.0.4. The results obtained on Linux are now in closer agreement to those obtained on Windows, thereby leading to better consistency of results between operating systems. When temperature differences occur as a result of this change, values less than 1 degree can be expected.

Bug 89454: The thermal solver should run in serial for a parallel coupled thermal-flow simulation

The finite volume (FV) parallel thermal solver for coupled thermal-flow simulations is not sufficiently robust, while the finite element (FE) parallel thermal solver is robust but is missing the appropriate FE formulation to properly connect with the flow solver. Overall, the thermal solver must run in serial for all parallel coupled thermal-flow simulations. For parallel coupled thermal-flow-structural simulations in the Simcenter 3D Multiphysics environment, the thermal solver will continue to run in parallel.