Error: Failed to find a solution. Segregated Step 1 System matrix is zero.
I am trying to run a simulation on the below MEMS heater simulation to obtain a surface temperature graph. Upon running a stationary study with default configurations. I get the following error.//...
View ArticleModeling drug distribution in randomly different sized spheroids
Hi, I am trying to model drug distribution in spheroids with different sizes. I am using a 2D circle geometry to represent one spheroid. 1. I tried to use the random function to make 100 randomly sized...
View ArticleRosenthal modelling in COMSOL
Hello, I would like to use Comsol in order to reproduce the results from the rosenthal model and evauntally expand on that. Currrently the curve that Comsol is porducing is not very close to the...
View ArticleProblem with 'Remesh Deformed Configuration'
Hello all,I am tring to study the Optical mode shape using 'Electromagnetic Waves' with a deformed mechanical geometry. This geometry is the mode shape of a mechanical mode.First, I got the mode shape...
View ArticleMaking contour plot from a 2D geometry
Hello, I am modeling transport of diluted species in a 2D circle geometry, time dependent study. I want make a contour plot with Time on y-axis and arc length on x-axis, with colors representing...
View ArticleHow to simulate surface roughness in CFD simulation?
Dear Mr./Miss.,We manufactured a liquid cooled heat sink by 3DP, and we intend to experimentally and numerically study the thermal and flow performances of the heat sink. The problem is that the...
View ArticleSet export window using java
Hi,I'm using the java API to build my 2Dmodel and I made a plot which has a high height-to-width ratio. When I try to create an animation using the java export function, I get a lot of white-space...
View ArticleMagnetic anisotropy
Hi,I have a three phase induction motor model in comsol and for the measurements, we are energizing the rotor and the stator does not have any winding. This is just the background knowledge of my...
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Legends position
How can I change the legends position, I want to place it above the cross section view horizontally.
View ArticleHow to calculate the average contact pressure of the actual contact area?
Hello,Im simulating currently contact pressure. For that i want to know the average contact pressure for every time step. I know that you can calculate the surface average, but my contact area is much...
View ArticleModeling an ion-exchange packed-bed reactor
Hello Everyone!I want to model an ion-exchange packed bed reactor. I would like to know which physics modules I should use. I need to model a packed bed tubular reactor in which the bed contains an...
View ArticleDipole Antenna Impedance and Far Field Basics
I am working with the App Library Dipole Antenna model. I am trying to understand Lumped Port Input Impedance and resulting far field gain of the antenna.Question 1: I understand the the...
View ArticleAcoustics Perfectly Matched Layer
I am trying to use the acoustics module with the perfectly matched layers to absorb any signal interacting with the boundary. What I want is analagous to plane wave radiation, but I want to use the...
View ArticleHow to define a prescribed initial guess for a topology optimization problem?
Dear Mr./Miss.,In topology optimization, different initial guess may result in different final topologies. In COMSOL “topology optimization node”, if initial value of the design variable theta==1,...
View ArticleInitial perturbation of displacement field
Hello, I try to solve a wrinkling problem of a membrane and i would like to provide initial random perturbation of displacement field. What is the proper way of defining my own initial solution?Thank...
View ArticleInquiry of Module in COMSOL 5.4
HelloI would like to model flow and heat transfer of nanofluid through a microchannel for a nanofluid concentration of 1-5%. I would like to calculate different forces like, drag, lift, brownian,...
View ArticleA very easy question?How can I control control the duration of the heat source？
I want to sim the thermal wave ndt progress, and i need the heatresource just continue 30s，but i dont know how to setup, hope you may help, thanks a lot
View ArticleElement order of Gauss point data? How many integration point?
Dear all,I am going to use the Gauss point data to define a material properties. I am confused by the element order of the Gauss point data, say 0, 2, 4,6,8 ,10.... Does these number mean the...
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