How to set orientation of silicon
I would like to simulate 3D solid mechanics eigenfrequency study, with just simple rectangular waveguide. My rectangular waveguide is just 400um x 80um x 40um, I set Fixed constraints at both end, and...
View ArticleFWHM Optimization
Hi all, I have trouble in identifying the objective function for FWHM in Comsol when I tried to optimize full-width-half-maximum of absorption-frequency dependence by changing parameters of the design....
View ArticleCan I thank the people who have helped and gave me answers to my questions?
I would like to say thank you to all of you who have helped me so far with my thesis on the movement and concentration of suspended particles in the nodal planes of an ultrasonic standing wave field....
View ArticleDefine geometry
Hello, I have to create a geometry with two concentric cylinders with its inner cylinder be acting as a membrane having some thickness. Flow through both the cylinders are countercurrent. Now, being...
View Articlemoving source in heat transfer problem
Hi: The attached images in the pdf file are from a model I'm working on. The axiymmetric model file is also attached. Basically, it's a model of a small disc of metal that is moving in a hole in a...
View ArticleDC discharge on COMSOL
I'm new to COMSOL.I have designed a converging diverging geometry which acts as anode and a conical cathode .The aim is to create an electric arc between the cathode and anode or rather to obtain a DC...
View ArticleError : Failed to find consistent initial values
Hi, I have made a 3D EHL model using Thin-Film Flow, Shell and Solid Mechanics. When computing the model, the following error is popping:"Failed to find consistent initial values" Maybe this error is...
View ArticleSolving coupled PDE's in COMSOL 5.2
Hi! Is there any way to solve coupled PDE's without using the Coefficient form PDE? I am not able to fit in my equations using that module. Also, How can i custom add boundary conditions(I am not able...
View ArticleComsol on Linux GUI doesn't start
Hi I have a problem with Comsol on my Linux laptop. Comsol seems to start and running in the background but the GUI or view doesn't open perfectly. I see only that threre is COMSOL open (see picture...
View Articlemaxm no.of newton's iterations reached ¶metric solver
l have been trying to simulate a microcantilever where it is fixed at one end and the other one is free.it is a frequency domain study.a surface preasure is applied on the top surface. I get the...
View Articletime scale issue when using optical pulse
Dear All Now I have an optical pulse which lasts a few of micro seconds, while the peak occurs at a few of femto seconds after onset of the pulse. Temperature reaches a high value at the peak and...
View ArticleUnable to input logarithmic function to comsol
I need to input ln(r) in expression and i have also tried with log(r) but it still showing unknown function error so what should i do now?
View Articlerange of electrical field
Hi every one i have question about the coloring range of plot .i have result for one geometric for electrical field , the comsol gives me the results with coloring range. also i have second geometric...
View ArticleSlower computation speed for cycle plastic constitutive model based on the...
For a single element, it takes 30min to solve for 10 cycles loading, and it takes about 20h to solve for less than 100 cycles loading. The computation speed is much slower than other FEA software....
View Articlehow to develop circular magnetic inductive coil
hi i am working in the area of wireless battery charging, i am new to the comsol, i need model the circular inductive coil for it, to measure the flux distribution, self inductance and mutual...
View ArticleHow to edit a mphbin file?
Hi all, Is it possible to open and edit a geometry import file in Comsol? For example:www.comsol.com/model/microwave-heating-of-a-cancer-tumor-30 At the Above application, there is a mphbin file which...
View ArticleElectromagnetic field in cavity resonator
Hi, everybody!! Could you advice or help me in simulating electromagnetic field in cylindrical cavity resonator? Thanks! shalm89@gmail.com
View ArticleMatrix has zero on diagonal
Hi experts, I mat a problem when simulate a AC/DC model. it came out as below: Failed to find a solution for the initial parameter. Segregated group1 Matrix has zero on diagonal. Returned solution is...
View ArticleThe inlet condition in the plasma module
Dear all, I am using the DC plasma module to model a certain discharge. I recently wanted to use the inlet condition in one of my simulations. But the problem is that I always get 'Inconsistent Initial...
View ArticleProblem when trying to simulate solar cell
Hello everyone, I am new to Comsol and am trying to simulate a simple silicon solar cell using the semiconductor module. I can setup the PN junction and find IV curves with no problem. However, when I...
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