Tagged: 16, fluent, fluid-dynamics, General, General - FLUENT
January 25, 2023 at 7:16 amFAQParticipant
With a non-conformal interface, the following warnings can appear: “Warning: Failed to correct face handedness”, or “left-handed faces detected” during Mesh Check or Initialization It means that it has generated left-handed faces and negative volumes. If you continue to solve with such a warning, then the normal vector of the intersected mesh will point in the wrong direction, and could cause an issue in terms of computing any flux terms on intersected faces. These left-handed faces are mostly appearing at locations where the surfaces, that are non-conformally connected, have sharp corners or contortions. At some points in such locations, the two surfaces could actually be passing through each other. In such a case, nodes projected from one surface to another, during the creation of the non-conformal interface, connect in a reverse loop leading to left-handed faces. To overcome this problem try: 1.Reverse the order in which the surfaces are picked inside the Grid Interfaces panel while creating the non-conformal interface 2. Try the TUI command /mesh/repair-improve/repair (with /mesh/repair-improve/repair-face-handedness yes) 3.If that doesn’t work, look carefully at the two surfaces involved especially at corners and turns. Modify the mesh to make sure that the two surfaces are not passing through each other at any point. The generated left-handed faces can be located by creating Iso-surface of Mesh->Face-handedness (Value = 1. Face-handedness is a parameter that is equal to one in cells that are adjacent to left-handed faces, and zero elsewhere). Using iso-surfaces rather than contours is suggested, since it might not be possible to see contours of face-handedness, since these faces lie on the non-conformal interface which is not available for plotting contours. Once these faces are located, go to Fluent Meshing (or another meshing software) and read in the mesh *saved before making the non-conformal interfaces* and fix corners/contortions close to the identified locations.
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.
- ANSYS Fluent: Introduction to the GEKO Turbulence Model Part I
- How can I create a Cell Register from a Cell Zone?
- ANSYS System Coupling: Two Way Fluid Structure Interaction – Part 1
- Delete or Deactivate Zone in Fluent
- Left-handed faces troubleshooting
- Running Python Script from Workbench
- ANSYS Polyflow: Adaptive Meshing Based on Contact
- Check CPU Time in ANSYS FLUENT
- Apply Custom Material Properties in Fluent
- How to overcome the model information incompatible with incoming mesh error?
© 2023 Copyright ANSYS, Inc. All rights reserved.