Subsurface flow in heterogeneous reservoir......
Hello all, I am trying to simulate a model which contains square geometry and two circles(inlet and outlet). I am a new user of COMSOL and facing many problems like how to put inflow and outflow rate...
View Articleli_ battery _1d_for_thermal_model
Dear sir or madan, I got a question when modeling a layer-structured liion battery consited of 2 cells connected in parallel. is the "li_ battery _1d_for_thermal_model" only designed for the...
View ArticleHow to deal with the Coriolis force?
Hello everyone! I'm trying to compute the time dependent response of a accelarator under a rotation accelaration which is a gauss pulse. And the inertial forces (Coriolis force, centrifugal force and...
View ArticleApply harmonic normal stress (traction)and shear stress (traction) at boundary
Hello everyone, I need to apply harmonic normal stress and shear stress at a boundary as excitation. Does anyone know how to perform it in comsol? I know we can apply prescribed displacement or force...
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 Articlewhy input Gaussian beam attenuate along the index fiber
Hello: I'm using comsol 4.3b "3D" to simulate a Gaussian beam propagating along a step-index fiber.The refractive index of the core and cladding are both real number. If I use the "port", I could find...
View ArticleTribology analysis of ball in socket configuration in 3D
Hi..I'm Liyana.. I am new user to this software and currently working on modeling and simulating hip implant joint which consists of a ball and joint interaction using comsol in 3D. I'm interested to...
View Articlefrequency response
Hi, please, can anybody help me to understand the graph "frequency response of the fundamental mode of the resonator" - you can find it in tutorials "Frequency Response of a Biased Resonator 2D/3D" or...
View Articlefar field calculation problem
Hi everybody! Currently I`m trying to simulate scattering on nanoparticle. I`m following the comsol tutorial, but I have problem with far field variable definition ( their name is yellow and comsol...
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 Articlequadratic Mesh
How can i to do a mesh with element quadrilateral quadratic 8 nodes? What the better V4.2a or 4.3 , or other to do the mesh. is it possible export matrix coordinate and topological? . In V.3.5a it is...
View Articlesimulation module for mixing
i want to know how to deal with mixer module and i want mix solid propelent........ thanx regards ravi prakash
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 ArticleSplit Ring Resonator!!!
Hi all, Iam trying to design a Split Ring Resonator(a spiral ) for my project. Iam struggling with it, as iam very new to comsol. Can any one help me how to start with it. To add more it has to have a...
View Article3D RF Module Calculation on Multiple Cores
I am planning to build a computer for running Comsol, and was hoping to find out how well Comsol can utilize multiple cores for RF Module calculations. The most demanding calculation that we would like...
View ArticleConvection-diffusion equation with open boundary
Hi, I am trying to solve a convection- diffusion equation with an open boundary condition. I think this option is not available for this kind of problem. Does anybody had already tryed to solve a...
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 ArticleInternal error in geometry processing.
Internal error code is 5018. The error happened under the "Free Tetrahedral 1" category. Basically my model involves forced convection cooling on a flat plate, and the error pointed to the convective...
View Articleelectric potential
I am doing simulation with Heat transfer module/Joule heating and I have a problem to define electric potential. I applied a potential to a silver surface connected to one side of a carbon film, while...
View Article