Fuel tank simulation
Hi, I have a project about fuel tank simulation. The thing that I try is similar to the sloshing tank example. However, since the fuel tanks are closed [ :) ] I need to limit the deforming mesh. Has...
View ArticleSubsonic Ramjet Model
I am attempting to optimize the design of a ramjet to be created for rocket experimentation. I have been working on the model for the fall semester attempting to refine it. I am now using a 2d axis...
View ArticleCFD - Surface roughness
Hey guys I really need your help on this one! I was wondering if any of you could tell me about the default settings of surface roughness's in COMSOL? All I've found about it in the documentation is...
View ArticleSpecifying a rotating boundary condition
I would like to simulate a rotating wall condition. For simplicity, imagine a square box. On the top surface of that box there is a circle. Inside of the box is a viscous fluid. I would like to impose...
View ArticleImporting a file from AutoCAD to COMSOL
I have created a 3D building model on AutoCAD and wish to import it to COMSOL for CFD analysis. Can I know the process for importing?
View ArticleUse of LiveLink for uploading 3d dwg file into COMSOL 4.3a
Can anybody help me about how to upload 3d dwg file in COMSOL 4.3a, please??
View ArticleUndefined value found in the stiffness matrix, requested mesh quality cannot...
Dear All, I am simulating a sphere flowing in a microchannel with solid traps (2D for simplification). Automatic re-meshing is activated. Two scenarios are considered: Scenario 1, the sphere will...
View ArticleLicensed number of users already reached.
Dear sir, I am from IIT Madras and I am using an institute license. While opening the heat transfer module in COMSOL, it is saying "Licensed number of users already reached.". Can I know what the...
View Articlesloshing tank problem with FSI
Hi all, I have seen the sloshing tank problem. I want to do same problem with fluid structure interaction that means interaction between fluid and container. fluid exerts a pressure on the wall on the...
View ArticleNon - Isotherma pipe flow
I am not able to find the "Non - Isothermal Pipe flow" module in my COMSOL 4.3a version. Can you help me out how to find it?? If not, I request you to help me with any method for simulating a pipe flow...
View ArticleAssigning Materials
While assigning materials to some solids in my model, I am getting a red cross below the material name in Model Builder. What does that mean? What changes should I do to use those materials for the...
View ArticleAssigning Materials to the solids in model developed
Sir, I was trying to assign material to the solids in the model. I am facing difficulties in assigning materials as the model kept on changing different colours and I am not sure whether my selection...
View ArticleNon - Isothermal Flow (nitf)
Sir, I have assigned materials to the domain elements that are required. And, in the step of inspecting the physics part after assigning materials, it is again asking for domain selection. What does...
View ArticleMeshing
When I apply "Physics Controlled Mesh" for the model made on COMSOL 4.3. I am getting a few error messages named 1. Out of Memory for meshing 2. Not able to mesh some domains, try changing to...
View ArticleWhich solver type to use for coupled K-Epsilon and pipe flow model?
I have a heat exchanger model that I am solving with the CFD and pipe flow modules. I am unsure of which type of solver I should use. I have looked at the COMSOL example model 'heat exchanger plate'...
View ArticleFree & Porous Fluid Flow -- Measure of mass flux
Hi All, I am attempting to model a stream bottom seepage collection device, but I getting some strange results. I am starting out fairly simple with no lateral flow in the free fluid, and setting the...
View ArticleUsing strain rate as a variable
Hi All, I am using COMSOL 4.2 to simulate plastic deformation of aluminum via a dynamic-viscosity approximation. The approximation requires strain rate. My question is how do I access strain rate for...
View ArticleMeshing Internal Volume of CAD import
All, I am trying to model fluid flow inside of a CAD object. How do I create a domain inside the object that I can mesh? I have capped all the openings. Thanks, John
View ArticleTIC Nozzle Simulation
Hi, I am a starter here, and trying to simulate the Nozzle flow by the new feature of this edition, High Mach Number Physics. I already came up with the contour of it and import it into the comsol. I...
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