General

General

  1. All Categories
  2. Fluids - General
  3. In Fluent, why is the Speed of Sound property required for materials when applying UDF for temperature-dependent density?

In Fluent, why is the Speed of Sound property required for materials when applying UDF for temperature-dependent density?

Tagged: ansys-fluent, udf
    • June 6, 2022 at 8:32 am
      FAQFAQ
      Participant

      When density is pressure-dependent, an extra term related to the speed of sound is needed in the pressure correction equation in order to stabilize the pressure solution for compressible flows. Consequently, when density UDF is detected, Fluent automatically adds the Speed-of-Sound property input, as there is no way to distinguish whether the UDF will include a pressure dependency or not. If the flow is incompressible (density a function of temperature only), you can simply set the Speed of Sound function to None

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.

© 2024 Copyright ANSYS, Inc. All rights reserved.