Hi everyone! It seems like the group has been a bit quiet lately so I thought I’d spark some discussion with a question about my simulation project. I’m currently working on a reactor simulation using Ansys Fluent with the Discrete Phase Model (DPM) enabled. The simulations are steady-state and I monitor the residuals and balance equations to determine if my solution has converged. I’ve set the residuals to (10^{-6}) for energy and (10^{-5}) for the other variables. However my solution consistently fails to converge. Has anyone encountered a similar issue or have any suggestions on how to achieve convergence? Any tips or advice would be greatly appreciated! Looking forward to your insights! 😊

Hello everyone, Currently doing the T-Flows crash course (available for free in the classroom section), I really recommend it for those who are starting their learning journey in CFD, it will introduce to a variety of important CFD topics. And now I am in the session where we work on a multi domain simulation as we work on a conjugate heat transfer parallel plate benchmark problem where the plate in the top is a gas, the one in the middle is a solid, and the one in the bottom is also a gas. And basically in this problem, we view how the heat is transferred from one gas to the solid plate to the other gas. And this case made me curious about when should we have the geometry for our cfd cases divided into multiple domains. I tried to Google it and search on YouTube but couldn't find anything. But my guess is that multi domain simulation come in handy when: 1.we are working with multiple fluids or multiphase flows. 2.fluids interacting with solids It would be helpful if somebody can inform me on this topic or refer me to some resources.

Could I ask yours about recommend some books for me which help in CFD or turbulence flow ??

User Defined Functions (UDFs) are amazing when it comes to defining motion to a boundary or setting complex boundary conditions or material properties. 💡 Coded in C language, UDFs give engineers the flexibility to add more complexity to the problems they are solving. 🔧 I wrote a UDF for a simple case of 2D airfoil simulation to get my hands dirty in the UDF domain of ANSYS Fluent. The UDF rotates the airfoil periodically by +/- 20 degrees, thus periodically varying its angle of attack. ✈️ Watch how the lift and drag forces vary with the motion of the airfoil in the video below. 📽️ https://youtu.be/duv2y70omEk

Does anyone know any book about odd even decoupling error in control volume method of solving? I would be grateful if you introduce a book that explains this topic. Thanks🙏