Can I increase the Volume Porosity value in a Porous Domain without affecting the pressure drop, assuming everything else remains the same?
March 17, 2023 at 8:58 amFAQParticipant
In some cases, a low Volume Porosity value can cause convergence problems when the flow is parallel to the Fluid-Porous interface. Convergence can sometimes be improved by using a higher Volume Porosity value. This won’t change the calculated pressure drop if the Loss Model is formulated in terms of the Superficial Velocity. For example, if the Loss Model is based on Linear and Quadratic Resistance values, the pressure drop is expressed as: Delta P = K*delta_X * V^2 Here, K is the Quadratic Resistance Coefficient based on Superficial Velocity, delta_X is the thickness of the porous media and V is the Superficial Velocity. From this equation, we can see that the Volume Porosity will not influence the pressure drop. It is only when the Loss Model is formulated from the True Velocity that the pressure drop will change, since the True Velocity depends on Volume Porosity. Note that in many cases it is not necessary to use a Porous Domain; a sub-domain with a Momentum Loss model can often be used instead.
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.
- How can I create a Cell Register from a Cell Zone?
- Left-handed faces troubleshooting
- How to overcome the model information incompatible with incoming mesh error?
- How to create and execute a FLUENT journal file?
- What are the requirements for an axisymmetric analysis?
- How can I Export and import boxes / Systems from one Workbench Project to another?
- Delete or Deactivate Zone in Fluent
- Running Python Script from Workbench
- ANSYS Fluent: Introduction to the GEKO Turbulence Model Part I
- ANSYS System Coupling: Two Way Fluid Structure Interaction – Part 1