Pseudo time stepping (Pseudo Transient Continuation) in ANSYS Fluent is used to solve steady-state problems by treating them as time-dependent problems. Here are some scenarios where pseudo time stepping is particularly useful:
1. Improving Convergence: When the solution is not converging well with standard methods, pseudo time stepping can help by providing a more stable path to convergence.
2. Complex Geometries: For cases with complex geometries or flow fields, pseudo time stepping can help achieve a steady-state solution more effectively.
3. Highly Nonlinear Problems: In highly nonlinear problems, pseudo time stepping can provide a more robust approach to finding a steady-state solution.
4. Pressure-Based Solvers: It is often used with pressure-based segregated solvers (SIMPLE, SIMPLEC, or PISO) or steady-state calculations with pressure-based coupled solvers
😄 What are benefits to use pseudo time stepping ?
1. Improved Convergence: Pseudo time stepping can help achieve convergence more quickly, especially for complex or highly nonlinear problems.
2. Stability: It provides a more stable solution path, which is particularly useful for cases where standard methods struggle.
3. Handling Complex Geometries: It can be effective for simulations involving complex geometries or flow fields.
4. Reduced Mesh Sensitivity: Pseudo time stepping can reduce the sensitivity of the solution to mesh size, making it easier to work with different mesh resolutions.
5. Flexibility: It allows for a more flexible approach to solving steady-state problems by treating them as time-dependent problems.
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