General

General

  1. All Categories
  2. Fluids - General
  3. How to fix convergence issues when using the pressure-based coupled solver for compressible flow through a porous medium?

How to fix convergence issues when using the pressure-based coupled solver for compressible flow through a porous medium?

Tagged: , , , , , ,

    • January 25, 2023 at 7:16 am
      FAQFAQ
      Participant

      This is a general limitation of this solver with strong body forces in a very limited region. It is documented for porous jump boundary conditions but also applies to porous zones with a high resistance. Typically, the convergence behavior is completely independent of all solver settings, the residuals stall at a very high level and the results can be unphysical. The only solution is to use the pressure-based solver with a different scheme than coupled, e.g. SIMPLE (depending on the specific problem). Compare with chapters “6.3.20. Porous Jump Boundary Conditions” and “29.3.1.4. Coupled” in the ANSYS Fluent 18.0 User’s Guide. Keywords: ideal gas; compressible; coupled; segregated; residual; residuals; convergence; porous zone; porous medium

Featured Articles

Introducing Ansys Electronics Desktop on Ansys Cloud

The Watch & Learn video article provides an overview of cloud computing from Electronics Desktop and details the product licenses and subscriptions to ANSYS Cloud Service that are...

How to Create a Reflector for a Center High-Mounted Stop Lamp (CHMSL)

This video article demonstrates how to create a reflector for a center high-mounted stop lamp. Optical Part design in Ansys SPEOS enables the design and validation of multiple...

Introducing the GEKO Turbulence Model in Ansys Fluent

The GEKO (GEneralized K-Omega) turbulence model offers a flexible, robust, general-purpose approach to RANS turbulence modeling. Introducing 2 videos: Part 1 provides background information on the model and a...

Postprocessing on Ansys EnSight

This video demonstrates exporting data from Fluent in EnSight Case Gold format, and it reviews the basic postprocessing capabilities of EnSight.

© 2023 Copyright ANSYS, Inc. All rights reserved.