Ansys Assistant will be unavailable on the Learning Forum starting January 30. An upgraded version is coming soon. We apologize for any inconvenience and appreciate your patience. Stay tuned for updates.
Heat Transfer

Heat Transfer

  1. All Categories
  2. Fluids - Heat Transfer
  3. Why is the actual coarsening rate so high and the number of radiation elements so low if I am using a discrete transfer radiation model with surface to surface option in ANSYS CFX?

Why is the actual coarsening rate so high and the number of radiation elements so low if I am using a discrete transfer radiation model with surface to surface option in ANSYS CFX?

Tagged: 16, cfx, Discrete Transfer, fluid-dynamics, Heat Transfer and Radiation, heat-transfer, radiation
    • June 5, 2023 at 7:05 am
      FAQFAQ
      Participant

      The coarsening rate has no actual meaning when using discrete transfer radiation model without participating media, since no coarsening is applied. When using the surface to surface option, the solver essentially reduces the volume mesh to a “single cell” or a small number of cells. This is why the coarsening rate is so high and the number of radiation elements (“volume cells”) is so low.

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.

© 2026 Copyright ANSYS, Inc. All rights reserved.