April 15, 2023 at 11:42 amSara AlaoSubscriber
I have been needing to use Ansys Fluent and the MHD module provided with the License of the product for my work. I am having issues with my fluid flow model, as the flow does not seem to react with the electric potential being inserted.
I have set the boundary conditions on the elements used, giving them an electric potential difference, which through experimental work does show its effect the fluid flow. I have changed the material properties to ensure that the electric permeability was taken into account, of the fluid and the solids being used. I have also simplified the model to 2D from 3D and changed the spacing of the elements, and resolution of the mesh.
There is no notable change in the results when the EHD and Energy models are switched on or off.
I have followed the Ansys Customer guide on this particular module when setting up my model, but it is not able to produce relevant results.
Let me know if it would be possible to help regarding this topic.
April 21, 2023 at 3:01 pmKonstantinAnsys Employee
That’s correct if you are not imposing an external magnetic field. The electric potential method solves the electric potential equation (see Sec. 22.3. Electric Potential Method of the Theory Guide), which is then used to calculate current j. The electric potential approach does not solve for the magnetic field. The Lorentz force is given by: F = j x B, which will be zero unless an external magnetic field is prescribed, hence no effect of the electric potential on the fluid. The electric potential will have an effect on charged DPM particles, however.
You should consider the magnetic induction method which will calculate induced magnetic field and give a non-zero Lorentz force.
- You must be logged in to reply to this topic.
Boost Ansys Fluent Simulations with AWS
Computational Fluid Dynamics (CFD) helps engineers design products in which the flow of fluid components is a significant challenge. These different use cases often require large complex models to solve on a traditional workstation. Click here to join this event to learn how to leverage Ansys Fluids on the cloud, thanks to Ansys Gateway powered by AWS.
Earth Rescue – An Ansys Online Series
The climate crisis is here. But so is the human ingenuity to fight it. Earth Rescue reveals what visionary companies are doing today to engineer radical new ideas in the fight against climate change. Click here to watch the first episode.
Subscribe to the Ansys Blog to get great new content about the power of simulation delivered right to your email on a weekly basis. With content from Ansys experts, partners and customers you will learn about product development advances, thought leadership and trends and tips to better use Ansys tools. Sign up here.
- Suppress Fluent to open with GUI while performing in journal file
- Floating point exception in Fluent
- What are the differences between CFX and Fluent?
- Heat transfer coefficient
- Getting graph and tabular data from result in workbench mechanical
- Difference between K-epsilon and K-omega Turbulence Model
- The solver failed with a non-zero exit code of : 2
- Time Step Size and Courant Number
- Mesh Interfaces in ANSYS FLUENT
- error: Received signal SIGSEGV
© 2023 Copyright ANSYS, Inc. All rights reserved.