Separating subdomain from domain
Hello,In my model I have an extrusion from a Work Plane that is immersed in one of the primitive 3D shapes. After completing all my operations, a form union/assembly joins them as one domain. How do I...
View ArticleThe moving mesh in Rotating Machinery Magnetic
I am simulating a permanent magnet motor in rmm in version 5.4. I defined rotor with moving mesh. I give it a constant revolution per time. When I export the animation with stored solutions (sequence...
View ArticleMultiturn coil_time based simulation_Pulseshape based voltage
Hi everyone,I have simulated a multiturn coil (with a Yoke) using AC-DC COMSOL 5.2. The DC simulation does show a succesful simulation results with a magnetic field lines (streamlines) generated...
View ArticleNo Convergence
Hello, I am new to Comsol and I am trying so simulate the follwing:A piece of hyperalstic material is placed on top of a rigid body. The hyperelastic materials is then deformed under the gravitational...
View ArticleError - Division by zero
Hi, can anyone help me. I am trying to set a temperature on a boundary surface. With a constant parameter it is running, but I want to it with the equation of Clausius-Clapeyron. For this I set an...
View ArticleNumber of Allowed "Release from Data File" Nodes
I am currently simulating the optics of an implantable LED-lens system. Here, the LED has the shape of a hexahedron (Picture of LED attached). Five faces of the LED serve as ray sources. My plan is to...
View ArticleContinue calculation with a single value from a sweep
Hi All,Here is a situation that occures very often in my optimization problems. I want to do a simulation in two steps:Step 1: A parametric sweep over the parameter f, where I probe the energy E. Step...
View ArticleSet solution of previous time step as initial condition
I want to export the Temperature solution of my model onto Matlab and set the entire Temperature matrix containing temperatures of all the domains as initial condition for next iteration. But I see...
View ArticleThe file increases in size every each run
I made one model and only change few parameters every time I run this model. I clear the solution from the previous study every time, but I noticed the file is taking more space. Why?
View ArticleClik here to view.
Directivity at a Certain Direction
Hi all,For a far field domain antenna study, I can achieve the maximum directivity by typing emw.maxDdB in the expression of a global evaluation, which is in the and direction. But I need to get the...
View ArticleCombination of Computational Fluid Dynamics and Chemical Reaction
Hello guys,I am studying about microfluidic technology, so I would like to use the simulation for it.I want to handle two types of model - Computational fluid dynamics (CFD), especially Multi-phase...
View ArticleDielectric slab
Dears, I am biginner of COMSOL. I have some queries about dielectric slab. I am able to produce electomagnetic wave in 2D dielectric slab but unable to propagate in 3D dielectric slab. For reference i...
View ArticleCompletely wetted or non-wetted wall with phase field
Hey !I've been trying to make a simulation of completely wetted or non-wetted walls (theta_w=0 or theta_w=pi) with phase field but it's always diverging. Have you ever tried and/or manage to do so ?...
View ArticleWhere to find COMSOL 5.4 variable description with details?
Hi Everyone,I am trying to modify some predefined equations in COMSOL 5.4 using the equation view, but there are a lot more variables than I expected. I don't know what many do and the short...
View ArticleCompute Error: "No Such File or Directory"
I am tyring to compute a model and getting the error "No Such File or Directory". The model was built in COMSOL 5.2 and I am running 5.4. I am not sure where this directory issue is coming from. Thank...
View ArticleFailed to form solid object
Dear All, does anyone can help me with the following issue,I imported stl file (rock sample) into Mesh Part, then into geometry and when I try to convert to solid form I faced the following error -...
View ArticleFluid structure interaction for a membrane
Hello, Iam trying to simulate a expansion of the membrane with both end fixed Iam facing following issues in solving the model. 1) If i give inlet boundary condition as velocity /discharge /mass flow...
View ArticleTwo phase flow using phase filed method : filling of liquid through different...
Hello, I am simulating the channel filling of water . The channel dimension starts with 600 micron in width and reduces to 200 microns and then again increases to original dimension of 600 micron. I...
View ArticleDifficulty in selecting geometry for boundary condition in a magnetostrictive...
Hello everyone, I am working on a magnetostrictive model which is a solid cube and I want to apply periodicity as a boundary condition to vertex to the opposite vertex, edge to opposite edge, and face...
View ArticleSpecific absorption rate in comsol
Hello everyone,Please see attached file and help me to understand how should i calculate SAR for 1 gram or 10 gram like in CST (shown in the file) in COMSOL?Any help would be appreciatedThankyou
View Article