How to implement COMSOL Commands
Dear All,I am trying to implement a single line of COMSOL Commands, which is that When I launch COMSOL, add the option -comsolinifile [path] to the COMSOL command, where [path] is the path to my new...
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How can I calculate maximum stress that is developed in a solid? if i know about young's modulus and all the necessary properties are knownany answer is helpful
View ArticleTTM (two temperature model) for ultra-fast laser ablation
Hello friends, I want to develop TTM (two temperature model) for ultra-fast laser ablation process. Frist laser gives the energy to the electron and the electron heated up. Now, this electron gives it...
View ArticleDecohesion on Flat-Punch Contact
HelloI've been trying to run a simulation of a flat-punch contact by using 2D Axisymmetric-Stationary analysis. The simulation is carried out for two bodies; elastic cylinder with flat tip in contact...
View Articlemumps allocation warning
The mumps allocation factor keeps increasing while the simulation is running, and it's up to a value of 10.I was wondering if I should let if finish, if it does, or change the Pivot threshold to 0.01...
View ArticleHow to add a mass source term in N-S equation
The below post is related to an archived discussion[start here] How to add a source term which is only acted in a limited location, for instance, a square in 2-D problems.
View ArticleProblems about treating the deformed mesh (deformed geometry)
Hello everyone, I am simulating the magnetohydrodynamic,the flow region expans gradually with the specified boundary moves. As the flow field contributes little to the magnetic field, so the influence...
View ArticleMass Flow Rate
Hello,I am modelling 3D pipe flow, the pipe is orientated vertically in z-direction. My inlet consdition is consttant pressure at top surface, and outlet is closed. The modelling is converging,...
View ArticleIssues about tracking interface with level-set and phase field method
Hi everyone, I am trying to make a level-set model for tracking water-air interface in a 2D micro-scale geometry. The geometry is built with one inlet channel, one square, and one outlet channel. The...
View ArticleRange of values for a variable gives different results than single value
In the frequency study step of my model, I noticed when I specify a range of values for a variable (in this case, the frequency of the incident wave), I get a different solution than if I pick one...
View ArticleDomain size for RF module problem
I am trying to get the scattering cross section and E field for a nanoparticle suspended in a water domain. The water domain is spherical in shape. The largest wavelength I will be using is 940nm....
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How to add surface gradient/divergence operators in "Coefficient Form...
I want to add a Coefficient Form Boundary PDE in an internal boundary,However, the gradient/divergence operator is , not the surface gradient/divergence operators.
View ArticleFloquet perodicity for a Kagome Lattice in general form PDE
Hello everyone,Has anyone figured out how to set a periodic boundary condition for a Kagome lattice in the general form PDE?
View ArticleCircularly polarized TE11 mode
Hello everyone, Does anyone know how I can create circular polarization in a horn antenna by using TE11 as input? The antenna I'm currently working on is a hybrid mode horn antenna that receives TE11...
View ArticleMismatch about strain-stress and Young's modulus
Hi everyone!I am doing structural analysis and I got a problem about the stress and strain. For a simple solid cube, the input Young's modulus is 2.8GPa while the obtained ratio of stress and strain is...
View ArticleEvaluate value in every single mesh element
Hello everyone!I would like to know if it is possible to evaluate value (for example surface velocity) in every single element that composes a mesh of a 2D structure?Thank you in advance.
View Articlesummation of a matrix (vector)
The below post is related to an archived discussion[I want to calculate sum(A.B) where both A and B are matrix (vector) and also they are coefficient of a PDE (sum(A(p,t).B(p,t))dp/dt=f(p,t) Thank you...
View ArticleProblem With Simple Conductive Heat Transfer Simulation
Hello, COMSOL noob here attempting a senior design project for school.I am attempting to model a very simple block of Mo (at room temp) placed onto a heated stage (at 250degC). However, my solution...
View ArticleExternal Current Density in MF module and MEF module
Hello!Different magnetic fields are obtained using External Current Density in MF module and MEF module.I tried to add some currents (which come from MATLAB codes ) in a conductor sphere to obtain the...
View ArticlePressure transmission between microdomes that are tangent to one another
Hello! I've encountered some problems with pressure transmission between microdomes that are tangent to one another. There seems to be a problem with the meshing at the contact points. I've tried form...
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