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Adding temperature varying with time

I want to enter temperature for calculating heat flux (temperature varies with time). Is there any method of entering the values? How can I use functions like interpolation, Rectangular etc,,,

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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:...

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Particles 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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Error 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. -...

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Heat 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...

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Topics

Hi, Please send to me the news related to these topics. Thanks

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RF 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

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Inconsistent 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...

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Adding 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...

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Failed 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...

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How 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...

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hello!

hello! are you Persian? I am Persian. can you help me about problem in comsol? best regards

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How 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...

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exporting 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...

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Inductively 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...

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Hagen–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...

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Particle 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...

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How 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??

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importing a 3D gegmented image as a geometry

Hello everyone, I am trying to import a 3D segmented image into the COMSOL as a geometry. Is it possible? Actually, after testing a bunch of softwares and doing some tricky things I finally succeeded...

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Adding temperature varying with time

I want to enter temperature for calculating heat flux (temperature varies with time). Is there any method of entering the values? How can I use functions like interpolation, Rectangular etc,,,

View Article
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