What’s New in Celsius Thermal Solver 2022.1 HF2 – #2 Support for Adaptive Time Stepping and Non-Uniform Time Step Criteria

This 3-part series highlights new and enhanced features of Cadence^® Celsius^TM Thermal Solver in the System Analysis 2022.1 HF2. The Sigrity and System analysis (SIGRITY/SYSANLS) 2022.1HF2 release is now available at Cadence Downloads.

Support for Adaptive Time Stepping (New):  You can now use adaptive time stepping as the time step criterion in the Celsius Solid Objects Simulation for Layered Structures and the Celsius Solid Objects Simulation for 3D Structures modules.

When using the adaptive time stepping criterion, the tool automatically introduces additional time steps (typically 10% of the existing time step size) whenever there is a change in the power gradient. This results in finer time steps that capture all power changes and lead to improved convergence and better accuracy.

For more information, refer to the Setting Transient Analysis Options and Setting up Transient Simulation Options sections of the Celsius Thermal Solver User Guide.

Non-Uniform Time Step Criteria (New): In the Celsius Solid Objects Simulation for Layered Structures and Celsius Solid Objects Simulation for 3D Structures modules, you can now specify non-uniform time steps as the time marching criteria.

In non-uniform time stepping, you can divide the total simulation time into smaller chunks and specify variable time intervals for each fragment. You can set smaller intervals to capture rapid power changes and longer intervals when infrequent power changes are expected.

For more information, refer to the Setting up Transient Simulation Options section of the Celsius Thermal Solver User Guide.

Team SimTech 

Cadence Design Systems