Non-Newtonian Laminar Flow, user defined flow law
I am trying to model ice (non-Newtonian laminar) flow under martian conditions using a flow law used in the literature for non-terrestrial ice modeling. It is essentially a power law form but combining...
View Articlevariable names
I would like to define functions for some material properties and need to use variables like shear rate in the function. I found from other posts that, for example, the laminar flow shear rate is...
View Articlegeneral stress-strain relation for fluid
Is it possible to define a general stress-strain relation for non-Newtonian laminar flow? Laminar flow seems to require you to define a dynamic viscosity. However I am trying to implement a flow law...
View ArticleAbout langmiur probe in comsol
Hello,everyone! I have a question in my thesis topic.I wonder if the Langmuir probe can work in the established comsol model, and if so, is it possible to define the probe portion directly in the...
View ArticleExplanation for the irregularity in my model
Hello, I made a 2D model for a single slit diffraction using EM waves and frequency domain. There seems to be some irregularity in the planar wave before the slit. Is this due to some reflection that I...
View ArticleSimulating a half filled eppendorf tube in a centrifuge
Dear all,We try to model the flows in an eppendorf tube while it's rotating in a centrifuge (positioned under an angle).We where succesfull in simulating a fully filled tube using the rotating...
View ArticleChange the label of reference system
Hi, is it possible to change the default label of the reference system {x, y, z} in a different triplet named {1, 2, 3}? It is just a matter of graphics especially when exporting an image of the model....
View ArticleAdditive Manufacturing model - requesting feedback
Hello fellow Comsol users,I am currently working on a layer-by-layer thermal simulation for additive manufacturing and by now, my results are not bad, though still far from perfect. In order to further...
View Articlesolid.pw
Hi all,I have some doubts regarding the variable solid.pw ; In particular, which is its meaning and which is the difference between solid.pw and solid.pm?Thanks a lot, Maria
View Article2DEG IN COMSOL
If anyone could share their insight on acheiving the 2DEG in a HEMT in COMSOL, I would be grateful.
View ArticleHow to apply comsol moving mesh in weak form pdes application mode?
Hi,I am simulating a bubble moving in fluid using Weak form PDEs application mode. I am applying moving mesh capability. The problem is, my mesh moves but the bubble do not move. Please can someone...
View ArticleMobility analysis in electron beam interaction
Hi everyone, I am trying to simulate a model to calculate the mobility of the charge carriers in a semiconductor on which some potential is applied and it interacts with a beam of incoming electrons...
View ArticleClik here to view.
How to set the Values of dependent variables
I want to solve a pair of equations which are based on other two study steps, but in the setting of the "values of variables not solved for", I can only choose on study( and i actuallly want to add two...
View ArticleUse interior fan to resemble submersible mixer
I am trying to make a 2D model of a reservoir filled with liquid, with submersible mixers in it. In 2D, the only option I see is to use the interior fan, but I am uncertain what values I should use as...
View ArticleHow to find the temperature of meniscus during capillary filling
Hello, I am trying to simulate 3d rectangular capillary filling using Leve set and two-phase flow, but simultaneously heat or (put at T+Tref) the one wall of the capillary, everything...
View ArticleAcoustic / Ultrasonic related queries
Hi,can any one suggest me, how to develop wave equation in comsol model.?A wairing your reply.Regards,Vipul
View Articleplot Dean flow vortex
I simulated the flow in a curved channel, and want to see the streamline in the cross section. I defined the cut plane, and since the curve is some sort parameterive curve, I didn't know how to...
View ArticleSimulating flow through a branched pipe
I am new to COMSOL. I am looking for a tool that can simulate flow through branched pipe.I'd like to know if it is possible to simulate 1D solute transport in a pipe section that diverges into 2...
View ArticleHow do you plot a Temperature graph along this line?
I have a 3D reactor model with baffles, and I want to plot the temperature and concentration of the average velocity path (line shown on the surface of the reactor).Need a way to determine the...
View Articlehow to set up a Semi-infinite area
I want to build a semi-infinite area. how to setup the periodic boundary condition
View Article