General

General

  1. All Categories
  2. Fluids - General
  3. How to avoid unphysical pressure spikes at several points during the simulation using an incompressible fluid in a closed domain?

How to avoid unphysical pressure spikes at several points during the simulation using an incompressible fluid in a closed domain?

Tagged: 17.2, compressible-flow, Convergence Problems, fluent, fluid-dynamics, General
    • January 25, 2023 at 7:16 am
      FAQFAQ
      Participant

      An incompressible ideal gas isn’t suitable for simulation in a closed domain. By switching to a compressible gas, the pressure spikes are avoided. Using Ideal Gas instead of constant density gases gives a more stable solution. For a given interface displacement, an incompressible fluid responds with a higher pressure change than a compressible one. Even if the constant density assumption is valid for the converged solution, it can lead to divergence while iterating.

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.