Скачать с ютуб ANSYS Fluent | Analysis of Two Concentric Rotating Cylinders | Moving Wall Boundary Condition | CFD в хорошем качестве

ANSYS Fluent | Analysis of Two Concentric Rotating Cylinders | Moving Wall Boundary Condition | CFD

ANSYS Fluent | Analysis of Two Concentric Rotating Cylinders | Moving Wall Boundary Condition | CFD Welcome to another in-depth ANSYS Fluent tutorial! In this video, we perform a Computational Fluid Dynamics (CFD) analysis of two concentric rotating cylinders using ANSYS Fluent. This tutorial focuses on setting up the moving wall boundary condition to accurately simulate the rotational effects between the two cylinders. What You'll Learn: How to define and set up the geometry for two concentric rotating cylinders. Step-by-step instructions for applying the moving wall boundary condition in ANSYS Fluent. Detailed guidance on meshing, setting up boundary conditions, and running the simulation. Post-processing the results to visualize and interpret the flow patterns and rotational effects. Who Is This For? This video is perfect for students, researchers, and engineers looking to deepen their understanding of rotating systems and fluid flow simulations using ANSYS Fluent. Tools & Features Used: ANSYS Fluent Moving Wall Boundary Condition CFD Analysis Techniques Watch More: Check out our other tutorials on ANSYS Fluent, ANSYS Workbench, and more to enhance your simulation skills. There are two concentric cylinders, which are rotating in opposite directions at the same magnitude of 20 RPS. The inner cylinder is at 305 K. whereas, the outer cylinder is at 295 K. The space between this two-cylinder is filled with Glycerine. Find out, the Velocity variations along the radial direction. Draw a radial velocity variation in a chart & export the velocity variations as Excel data. What Will you Learn From this Tutorial? ✔ Creation of 2D Geometry in ANSYS Design Modeler ✔ All Quad Meshing, in ANSYS Meshing. ✔ How to check Skewness, Orthogonal Quality, and the Aspect ratio of the Mesh. ✔ How to Setup a Moving Wall Boundary Condition? ✔ How to change the no of arrows in Velocity Vector. Here are some of the best tips for using ANSYS Fluent effectively: 1. Understand Your Problem First Before jumping into the software, clearly define the physics of the problem. Understand the flow regimes, boundary conditions, and material properties. This helps in setting up the problem correctly from the start. 2. Start Simple, Then Add Complexity Begin with a simpler version of your model to ensure the setup is correct and the solution is converging. Once you’re confident, add more complexity like additional boundary conditions, turbulence models, or finer mesh. 3. Choose the Right Turbulence Model Turbulence modeling can significantly affect your results. Use the simplest model that accurately captures the physics of your problem. For example, the k-epsilon model is good for most industrial flows, while the k-omega SST model might be better for flows with separation or adverse pressure gradients. 4. Mesh Quality Matters A high-quality mesh is crucial for accurate results. Ensure your mesh is fine enough in critical areas like boundary layers and regions with high gradients. Use the mesh quality metrics (e.g., skewness, aspect ratio) in ANSYS Fluent to evaluate and improve your mesh. 5. Refine Boundary Layer Mesh For accurate wall-bounded flow simulations, especially in turbulent flows, a well-refined boundary layer mesh is critical. Ensure you have enough layers and a low enough y+ value to resolve the boundary layer effectively. 6. Check for Convergence Thoroughly Convergence is more than just monitoring residuals. Check that your key physical quantities (e.g., drag, lift, pressure drop) have stabilized. Use more than one convergence criterion, such as mass flow rate or force balances, alongside residuals. 7. Use the Appropriate Solver Settings Choose between pressure-based and density-based solvers depending on your application. For incompressible flows, the pressure-based solver is generally preferred, while compressible flows often require the density-based solver. 8. Monitor Solution Progress Set up monitors for key variables (like velocity, pressure, or temperature) at specific points in your domain to track the solution's progress. This helps in identifying any issues during the simulation. 9. Leverage Hybrid Initialization Use hybrid initialization to generate a better initial guess for your flow field. This can help in reducing the number of iterations required for convergence, especially in complex or challenging cases. 10. Post-Process Your Results Carefully Take time to thoroughly analyze and interpret the results. Use contours, vectors, streamlines, and animations to visualize the flow field. Cross-check the results with analytical solutions, experiments, or literature to ensure they make sense. If your problem requires custom boundary conditions, source terms, or material properties, consider writing UDFs to extend the functionality of ANSYS Fluent. If you have any questions or need further assistance, drop a comment below, and we'll be happy to help.