MMA algorithm
Why does the MMA algorithm take the integral form for solving the objective / constraint function of the topology optimization problem? What is the theoretical basis behind it?
View ArticleSpatiotemporal varying relative permittivity based non-reciprocal transmission
I am trying to reproduce the paper: Complete optical isolation through indirect interband photonic transitionsThe non-reciprocal transmission they have demonstrated in fdtd by their in house simulation...
View ArticleSimulating a toroidal B-field inside a magnetic focusing horn
Dear COMSOLers,I am trying to study the magnetic field map produced inside a magentic horn (geometry photos and simplefied model attached). The current is flowing in the r-z-plane rather than...
View ArticleModeling the transition from undeveloped flow to fully developed flow on a pipe
First of All, I appreciate you for taking the time to read my question.I need some help finding the right path to start modeling the transition from undeveloped flow to fully developed flow on a pipe...
View Articlefree licence for students ??
does comsol provide a free student licence or free trail to their software ? is there an online software of comsole multiphasics ?
View ArticleComsol 5.5 cannot be launched after installation
After i install it, there is no react when I click it. Only the update is working.
View ArticleEvaluate Impedance of a coil
Hello All, I am trying to include impedance calculations in my model.To keep it simple, let's consider my model to be AC/DC analysis with a single conductor coil. To realize it I followed the example...
View ArticlePiecewise constant function over a boundary
Hello,I have a 2D axisymmetrc model and I'm trying to define an input pressure on the edge as a piecewise constant function of the r-coordinate.Here's what I want to have for each segment:...
View ArticleVariable time step for pulse features
Dear All,I am trying to model a dc discharge in nitrogen with plasma module.The time dependent solver works fine to a point with time steps of 10^-8s. However, at a cetain instance in time, there is a...
View ArticleModeling no separation in Comsol
Hi,I am a new user of comsol. I am trying to model sliding in Comsol with no separation. I have tried to approaches to tackle this. 1. With adhesion contact and 2. General extrusion and prescribed...
View ArticleWarning exists during Form Union
Hello everyone,I met a problem by forming an union: when I try to form a union, half of the geometry is removed (2D model, r<0 is removed, axis symmetric), what should I do for this ?
View ArticleOptical self heating?
Hello everybody,is it possible to model optical self heating in COMSOL? Currently I'm trying to simulate a silicon photonic ring resonator/modulator using the wave optics module. The resonance of such...
View ArticleCan you give me some advice about the simulation of biofuel cells?
I'm a postgraduate student majoring in enzymatic biofuel cells. I wanna to construct a membraneless biofuel cells model consisting of anode, cathode and electrolyte. The fuels for anode and cathode are...
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View ArticleWHATSAPP+1(424)4443857 BUY ABORTION PILLS IN MANZINI,MBABANE
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View ArticleGeometry causes abnormal physics settings
Hi everyone, I made a inductive heating coil with a complex geometry composed of multi-geometric shapes. When I set physics，it shows different domains rather than one total domain. The coil geometry is...
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