about solving
thank a lot for my last question the answered.. and now i will ask again about solving... there are many menu in solving.. and what the meaning about in submenu 'solve parameter' thare are...
View ArticleHow to Couple Free and Porous Media Flow with Heat Transfer In Solids
Hi Everyone, I am new to COMSOL and I am trying to simulate a solar panel cooling system. I am trying to simulate in 2D the heat transfer between a thin rectangular layer (the photovoltaic cell),...
View ArticleGeometric Nonlinearity problem
I have an odd problem. I am trying to recreate the Large Deformation Beam model (www.comsol.com/showroom/documentation/model/204/) before I start my own project to investigate buckling. I was following...
View ArticlePML error
Hi all, Can someone point me what I do wrong? I tried to repeat Scattering from plasmonic nanosphere model, so I have Au sphere + Air domain (sphere) +PML/ABC domain (sphere). When I defining PML as...
View ArticleHow to Couple Free and Porous Media Flow with Heat Transfer In Solids
Hi Everyone, I am new to COMSOL and I am trying to simulate a solar panel cooling system. I am trying to simulate in 2D the heat transfer between a thin rectangular layer (the photovoltaic cell),...
View ArticleHow to save deformed geometry so that it can be used as new initial geometry...
Hi. I am looking the ways to save the deformed geometry at the end of analysis, and i would like to use it as a completely new initial geometry for further analysis, by clearing out the previous...
View ArticleVarious Problems for Two Phase Flow coupling with Electrostatic
Hi! I am working on Two Phase Flow coupling with Electrostatic using transient (phase initialization and time dependent) solver to simulate electrospray phenomenon, I have encounter some problems and...
View ArticleSimulation error
Hi , I am getting this type of error whey i am trying to start simulation. "Variables property does not include all variables in Xmesh" Could anybody can give me any solution/ suggestion. Thank you...
View ArticleInconsistent uni-directional constraint with Conjugate Heat transfer
I am trying to model a simple high temperature hydrogen heat exchanger with the conjugate heat transfer module. While I have been sucessfull in modeling individual tubes of the hydrogen alone, I cannot...
View ArticleSegregated Group Solver different results
Hi folks, I have been using COMSOL for a while now and, sometimes, when facing a difficult convergence problem I do mess around with the solvers a bit. I have seen some posts here on the forum...
View ArticleUsing lower limit node
Hi, I'm trying to use the lower limit node, but I can't select any variables because the variables window is not there. I can select variables in the segregated step nodes. See attached file for...
View ArticleUnidirectional coupling of a time dependent study to a stationary study
Hello, I am using structural mechanics module and a stationary study to calculate stresses and strains in a simple 2D axi-symmetrical model. The model has a thermal expansion node. I have another study...
View ArticleOptimisation of processing parameters in laser sintering of metal/alloy powders
Hi everyone, I am new to COMSOL Multiphysics.. Can anyone help me in simulating selective laser melting(SLM)/direct metal laser sintering(DMLS) of metal/alloy powder media in layer-by-layer fashion? IN...
View ArticleFSI - High convergence problem
Hi all, I'm new to COMSOL and I have a problem that involves an interaction between air and a solid body. I am interested in the torque generated on the body by the moving fluid. My intent is to use...
View ArticleConvergence problems
Hi there, Could any one give a hand? I have no idea what is happening with the solver or the model. I am trying to model a laminar flow without any other physics. The default plots during solving...
View ArticleStudy
I would like to deform a component and strain it in the deformed state with internal pressure. How do I set up the study, so that these two processes run sequentially. The pressure load is to take...
View Articlethe mass matrix is zero
Hello I am trying to simulate my design. In the first step, I tried Mode Analysis but unfortunately I faced this error: The mass matrix is zero Please let me know how can I fix it? Of course I read...
View ArticleLaplace-Beltrami Operator on a Curved Surface
Hi all, When I use the Coefficient Form Boundary PDE (cb) on a curved surface, is differential nabla operator the generalized operator which implies the curvature, say, is the Laplace operator the...
View ArticleCombining pysics
Hey. I want to ask if there are any settings in COMSOL-e, when combining both effects of multiple physics into one calculation. For example, electric currents and laser heating in one componente behave...
View ArticleMy biggest wish for X-mas: Solution for crack modeling
Dear Comsol gurus, dear support, my biggest wish for X-mas was, that the new 4.4 release would finally provide some reasonable approach for crack modeling as being standard in other software packages....
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