Error in multiple domain 3D simulation of thermal transfer NITF
Hello Sir Sergei, I am trying to model the heat and mass transfer a layer of cereal grains. At the moment I am still doing the thermal transfer and hopefully soon the mass transfer. The modeling of the...
View ArticleError in multiple domain 3D simulation of thermal transfer NITF
Hello Sir Henrik, I am trying to model the heat and mass transfer a layer of cereal grains. At the moment I am still doing the thermal transfer and hopefully soon the mass transfer. The modeling of the...
View ArticleSetting convergence condition in fluid simulations
Dear Sir/Madam I'm a novice in COMSOL use. I have a question regarding convergence in fluid flow simulations. I know that in FLUENT one has the possibility to set the divergence of velocity field to a...
View ArticleTracking Residual
I need to track the residual in my simulation in order to represent how closely the governing equations are being represented. I know comsol keeps track of residual since ive had several errors...
View ArticleHow to simulate the water boiling by Level-Set method
There is a good example simulating water boiling by phase field. I am trying to use the Level-Set method. However, I was frustrated by many times of failure. My problem is how to deal with the...
View ArticleSimulation of Stirling Engine
Hello everybody I'm currently trying to simulate the fluid flow in a stirling engine (beta) which I've built from the following video:www.youtube.com/watch?v=X2qssmxA82U You should try building it;-)...
View ArticleLaminar outflow boundary condition does not converge!
Hello everyone, I am new to this programm and want to simulate the first part of a streamed circular duct. It serves as an hydrodynamical entry length to develop the velocity flow profile. In the...
View ArticleForced convection - horizontal flow against a plane sheet with a blunt edge
Hi folks, that's my first time I'm working with COMSOL MULTIPHYSICS and I'm trying to simulate a horizontal flow against a plane sheet with a blunt edge. I use convective and conductive (cc) and...
View ArticleIsothermal contour normal vectors
Hi All, Background: I am mapping the temperature gradients at the solidification front of a laser generated melt pool. However the gradients need to be measured in the direction normal to the...
View Article3D simulation of drop coalesnce
I am try to solve the two drop coalescence by applying the two phase flow and phase field method in comsol. 2D it solve the problem very accurately. but 3D is not. kindly suggest any modification need...
View Article3D electrocoalescence with multiple inlets
Hi I have based my simulation on the electrocoalescence example except I have two phases coming in at the inlet. As such I have defined an explicit boundary selection for each inlet phase and have two...
View ArticleNatural Convection in a Box
Hi, I'm trying to get that cats eye picture of natural convection in a box. My solution converges but I dont see any streamlines. If someone can spot a mistake that I made, it would be helpful. I am...
View ArticleTorque from Shear Stress Integration
Hello, I have been working on a model of a flat plate very near the wall of a duct with air flowing through it. In order to find the forces acting on this plate, I have been integrating T_stress over...
View Articleapplying reaction force operator on an inner boundary
Hello, I'm trying to calculate normal mass and heat flux on an inner geometry boundary (no boundary condition is applied on the boundary) using the reacf() oprator (reacf(p) for mass and reacf(T) for...
View ArticleWhich interface choose for fluid flow with heat transfer
Good day! I would like to ask for an advice. I wish to solve the following problem: I have a plate of a solid material with low thermal conductivity. There is a pipe with cold water inside the plate....
View ArticleModelling transport of species in porous media
I am trying to solve a similar problem. I have looked at all the available mph models. Could you supply an example of your model and I could take a look at it. Perhaps we could benefit from the mutual...
View ArticleApplying weak constraints in Darcy's law
Hi, I'm working on vapor intrusion modeling from subsurface into the overlying building. I have a large domain (100m X 100m) and a building (10m X 10m) with 2m basement is locating at center of the...
View ArticleDisproportionate Number of Degrees of Freedom
Hi All Using an adapted mesh roughly numbering 2 million mesh elements, the solver calculates based on 14 million degrees of freedom which is outside my RAM capabilities (48Gb). When using a normal...
View ArticleError in multiple domain 3D simulation of thermal transfer NITF
Hello Sir Sergei, I am trying to model the heat and mass transfer a layer of cereal grains. At the moment I am still doing the thermal transfer and hopefully soon the mass transfer. The modeling of the...
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