DC resistivity modeling
Hi, I want to use COMSOL to model resistivity (geophysics). (Electrical Resistivity Tomography, ERT) I have a number of cells (side by side, creating a square of cells in both x and y direction), which...
View ArticleModelling laser ablation in COMSOL
Hi, I have a fairly simple question about COMSOL. I have made a model in which a block is heated by a pulsing laser heat source. I am using an iterative approach to solve it by solving for each pulse...
View ArticleFailed to evaluate variable jacobian!..
Hi everybody, I want to simulate a heat transfer and navier stokes problem. I have two subdomains. In one of the subdomains only the heat transfer equation is solved, not the navier stokes equation. To...
View ArticleTemperature Below Ambient When Heating Small Plate Interface
Hello, I'm trying to model the heating between two milli-scale nylon plates using aluminothermic nanoheaters. The nanoheaters are approximated with a boundary heat source between the two plates, and...
View ArticleGaussian heat flux
Hi I need to model a moving laser Gaussian heat flux over a surface and i want to know the temperature and time. kurian
View Article2D TRANSIENT Heat Transfer Problem
Hi everyone, I am encountering an error in the time dependent situation - Failed to find consistent initial values, last time steps not converged. I have specified 'initial values' and the required...
View ArticleUsing a Gaussian Pulse
Hi everyone, I'm actuallay working on a modeling of a laser pulse which is heating a front of a material in order to determinate the diffusivity, my current issue is that i would like to model my heat...
View ArticleLaser Drilling on silicon carbide
I am trying to simulate material removal during percussion laser drilling. The laser(Heat) source must move along the depth of the hole as the material is removed. The material needs to be removed as...
View Articlejoule heating
im new to comsol and my work is to design a heating element by applying electric potential and it is time dependent,,according to my model,heat should dissipiate in ceryain marts,i have used kanthal...
View ArticleSegregated solver steps do not involve all components.
Dear Mr. Gene, Please I noticed you had a segregated solver problem a couple of years ago. Please did you solve it? If yes could you be kind to share you experience with me? I am actually facing it on...
View ArticleRegarding out-of-plane thickness in Conjugate Heat Transfer
Hi all, I assume that default out-of-plane thickness is 1m for Conjugate Heat Transfer or Non-Isothermal Flow. I would like to if there is a way to modify it to some other value like in Magnetic Fields...
View ArticleMoving Laser
Hello, i am new at comsol and a have an 3D block with a circle on top (that simulates the laser beam). I realized it with an embedded workplane. Now i want to move the boundary of the circle. Can...
View ArticleCustom heat transfer boundary condition
I am solving for heat flow from a hot solid to a pool of coolant around it. I need to impose a user defined boundary condition at the surface of the solid which is in contact with the coolant. The...
View ArticleHow to measure resistance between two points
Hi, I have a simple problem. I designed a micro heater and applied a 2V supply on its ends. I placed a idt along it which i have given no supply, now i want to measure the resistance between the ends...
View ArticleBoundary as a thin wall (baffle) in non-isothermal model
Hi I'm a new member. Now I'm simulating about 3-D non-isothermal model in Comsol (4.3b). I try to make geometry box, 2 meter(H), 1 meter(W), and 5 meter(L). But in the box must have plate (like a...
View ArticleJoule Heating in copper nanowire
Hi Ivar, I hope I am not bugging you by reaching out to you many times, but the I am in quite a tight situation. What I am trying to simulate is a nanometer strip of copper surrounded by SiO2 and a...
View ArticleVapor Chamber
Hi All. Greetings. I am trying to find a suitable code to simulate the vapor chamber heat sink. This chamber is a vacuum space containing water. Inside this chamber, the water evaporate at lower...
View ArticleMeshing Small Channels with High Aspect Ratio
Hello all, I am attempting to mesh a heat sink with forced air. I have made this same model where the fins have a pitch of 10mm+ and it works fine. However, I have now attempted to reduce the pitch to...
View Articleconductive layer between two separated bodies/domains
Hello all, I am a relatively new user and I am setting up a model to analyze heat transfer into a bulk mass. For example: the mass consists of three cubic blocks in a row. They have 1mm of spacing in...
View Articleweird temperature profile - below the ambient
I am new to COMSOL. I have a simple heat conduction model in a rectangular 2D axisymmetric solid with a constant boundary temperature. The temperature is below the ambient, at some of the points in...
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