Setting temperature initial condition at specific location
Hello, I'm trying to solve a porous media heat transfer problem. the geometry of the problem includes 10/200 meters rectangle, where I'm setting a linear temperature gradient by the following equation:...
View ArticleParticles traveling through boundaries
Hello All, I am attempting to use the particle tracing function on a laminar flow in a small channel with obstructions in the channel. I modeled the design after the lunchtime seminar on the particle...
View ArticleError while processing
Sir, While computing the results for my model, I got an error which says" Failed to find consistent initial values. Segregated group 2 Out of memory during assembly. Last time step is not converged. -...
View ArticleHeat loss in hydraulic hose
Hi, I'm working on an project where it's in my interest to find the heat loss to the surroundings, from the hydraulic fluid inside a hose. I have access to Comsol Multiphysics 4.3 through my work and...
View ArticleRF Source
Hi, I want to apply a current or a voltage source to a rectangular surface in a COMSOL RF module problem. Would you please let me know how I can do that? Regards, Elham
View ArticleInconsistent uni-directional constraint with Conjugate Heat transfer
I am trying to model a simple high temperature hydrogen heat exchanger with the conjugate heat transfer module. While I have been sucessfull in modeling individual tubes of the hydrogen alone, I cannot...
View ArticleAdding a Faxen Force on Stokes drag force in Particle Tracing Module
Hi everyone, I am trying to use the particle tracing module with a non-uniform laminar flow in a channel. I am using "Drag Force" to trace the particles' motion. However, the Stokes force is defined...
View ArticleFailed to find the consistent initial values
Dear sir, I am getting an error after solving as follows"Failed to find the consistent initial values Last time step is not converged. - Feature : Time - Dependent Solver1 (sol1/t1) - Error : Failed to...
View ArticleHow to reduce numerical diffusion problem when simulating micromixing
Hello Comsol friends, I have a short question - my simulations of micromixing exhibit rather fast mixin compared to the measured results, especially at high Peclet numbers (~ order of Pe~ 10 000). I've...
View Articlehello!
hello! are you Persian? I am Persian. can you help me about problem in comsol? best regards
View ArticleHow do I model two different fluids in one domain?
Hi, I am new to COMSOL, and am trying to model a microfluidic device that has two fluids, each with a different conductivity. I tried building a geometry with two domains that are a union with an...
View Articleexporting 3D simulation's output data from model 1 and importing as input...
Hi, I am trying to simulate on micro-mixer with 3D structure. I am having trouble with importing the model 1 output data to the model 2 input profile correctly. I tried using the interpolation function...
View ArticleInductively coupled plasma-High vacuum-Laminar flow-Free Molecular Flow-times...
hello! *** first question: I try to simulate the device using the PLASMA MODULE (inductively coupled plasma) and LAMINAR FLOW in a vacuum (10 millitorr). The problem is that when I run the solver, had...
View Articleabout 'Warning : Re-ordering of null vectors failed"
Dear all, I'm trying to simulate the dynamic behaviors of the linear control solenoid valve. The spool motion is determined by the force balances, which are calculated each fields, and...
View ArticleHagen–Poiseuille flow
I would like to use Comsol for a microfluidics project I'm working on. As this is my first time working with Comsol I am trying to simulate a simple problem to compare the simulation with analytical...
View ArticleParticle tracing - particle counting
Hello to everyone, Im new to COMSOL and currently trying to work with particle tracing for fluid flow. The model we are working on is part of vascular network and we are using as physics : structural...
View ArticleHow to enter the temperature that varies with time??
Due to the variation in air velocity, the external temperature varies with time. Can I know how can I input the values using an equation or an excel sheet??
View ArticleSetting temperature initial condition at specific location
Hello, I'm trying to solve a porous media heat transfer problem. the geometry of the problem includes 10/200 meters rectangle, where I'm setting a linear temperature gradient by the following equation:...
View ArticleParticles traveling through boundaries
Hello All, I am attempting to use the particle tracing function on a laminar flow in a small channel with obstructions in the channel. I modeled the design after the lunchtime seminar on the particle...
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