Скачать с ютуб How to refine your mesh inside the Ansys Fluent в хорошем качестве

How to refine your mesh inside the Ansys Fluent

Refining the Mesh: You don’t want to increase the entire mesh since making the mesh twice as dense gives you a factor 8 times large mesh (2^^3=8). Instead, you should locally refine the mesh where large gradients exist. In these regions, the heat flux will be most affected by improving the mesh. Therefore, you can use the solution you have obtained and locally adapt the mesh where most changes occur, i.e. regions with large gradients. You should SAVE AND MAKE A BACK-UP of the project at this time, before you start to alter the mesh. This is very important as once you do the mesh adaptation you cannot undo it. I also recommend that you write out the Fluent case&data files from File - Write - Case and Data. If you, for some reason, don’t run Fluent via Workbench (it can also be run standalone), the menu looks different and you find this option to write files under File - Export - Case and Data. To refine the mesh by Adaption got to Domain - Adapt - click Manual A new window ‘Manual Mesh adaption’ will pop up. Click - Cell Registers - New - Field Variable like Figure shown below. In the Field Variable Register setting, you can choose different setting such as type, derivative option, and scaling option. Choose Type - Cells more than. This is because we will set the threshold later for FLUENT to refine or coarsen cells with value more than the gradient of parameters we choose. In this case, we will start with gradient of temperature. Choose Scaling Option - Scale by Global Average Choose Derivative Option - Gradient Gradient of - species - Temperature Compute to obtain an estimation of existing gradients In this simulation you should specify the Refine Threshold. Go to Cells having value more than and type a value between the minimum and maximum. Then press Save/Display and in the TUI you can see how many cells will be added. After you are satisfied with the number of cells marked, click save. In the Manual Mesh Adaption window, choose the cell register you just created in ‘Refinement Criterion’ click Adapt to make the change (NOTE: only press Adapt once).