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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.
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).

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.

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).

To use DMP processing you require a Simcenter 3D Thermal/Flow DMP license, which removes any software limitations on the number of solver processes per run for parallel processing and enables solving over networks and clusters. Each node in the cluster computes its own partition of the solution and communicates with the other nodes using MPI to share information. With the Simcenter 3D Thermal/Flow DMP license, you manage DMP processing using a process scheduler, such as Sun Grid Engine Software (SGE), or Load Sharing Facility (LSF), which organize the queues and resources to perform the analysis in parallel.

Managing DMP process on a scheduler

The TMG Executive Menu is a standalone application that lets you run a thermal, flow, or coupled thermal-flow analysis from an XML file by deploying the DMP process on a scheduler, independently from Simcenter 3D.

The scheduler files connect to a scheduler, through the TMG Executive Menu, which distributes the jobs, in a sequential order, to the cluster. The scheduler queues and executes the jobs when the resources you requested become available.

This guide describes:

The general workflow for executing the DMP simulations jobs.
Submitting the DMP simulation using the TMG Executive Menu.
The scheduler dependent files required to submit the jobs to the scheduler.