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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.
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.
Submit a DMP simulation
You submit a DMP simulation from the TMG Executive Menu, which is on a machine that has access to the solution input XML file and the scheduler. It is preferable to use the head node of the cluster, which is accessible from all the nodes.

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.
- 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.
  - Parallel processing on a cluster
    Using distributed memory architecture, the TMG thermal-flow solvers support high performance computing (HPC) for large models on a multi-node cluster. These solvers use Distributed Memory Parallel (DMP) processing based on domain decomposition and the message passing interface (MPI).
  - Executing DMP simulations
    The following workflow describes running DMP simulations. The TMG thermal-flow solvers installation, TMG Executive Menu, and required scheduler dependent files must be all accessible by the nodes in the cluster.
  - Submit a DMP simulation
    You submit a DMP simulation from the TMG Executive Menu, which is on a machine that has access to the solution input XML file and the scheduler. It is preferable to use the head node of the cluster, which is accessible from all the nodes.
  - Scheduler dependent files
    TMG Executive Menu requires multiple scheduler dependent files to communicate with a scheduler.
  - A host file
    The scheduler generates the mayampi.hosts file at runtime before running the jobs in parallel. This file includes a list of cluster nodes that will execute the jobs.
- 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.

Submit a DMP simulation

You submit a DMP simulation from the TMG Executive Menu, which is on a machine that has access to the solution input XML file and the scheduler. It is preferable to use the head node of the cluster, which is accessible from all the nodes.

You must have a DMP license and make sure it is available from the nodes in the cluster.
The following files are required and must be stored in a directory accessible to all the nodes in the cluster, for example, within the NX installation directory or wherever the tmg patch is installed:
- A scheduler configuration file
  Note:
  You can find the file to edit in . <installation_path>\tmg\exe\scheduler_info.xml
- Submit and delete scripts
- A solution input XML file, <simulation name>-<solution name>.xml
The UGII_TMG_DIR and UGII_BASE_DIR environment variables defined on the master node. For more information, see Environment variables.

Open a command prompt window and type the following command to start the TMG Executive Menu:
```
$UGII_TMG_DIR/com/tmgnx.com
```
At the prompt, enter the ND command switch to run the analysis from XML, using the DMP (scheduler) process.
At the prompt, enter:
1. The name of solution input XML file.
2. The scheduler label, which is defined in the scheduler configuration file. For example:
```
<scheduler label=”MyDesktop”>
```
3. The number of processes required to run the simulation.

You can also enter the following command to add the path directly to the folder that contains a scheduler configuration file:

$UGII_TMG_DIR/com/tmgnx.com ND -inPath <...run_directory/scheduler_configuration_file> <scheduler label> <number of processes>