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Test function for Electric field
Hey all I am working in the 2D piezoelectric module and I want to take weak forms of Electric field in different direction, test(pzd.EX) and test(pzd.EY) but its showing error. When I try by making the...
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How I can add data for a solution to a new study?
I'm working on the simulation of an iron foundry, I made a transient thermal study, and I exported data solution in time 200seg temperatures. I would like to know how I can add the output exported to a...
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biphasic flow
I want to do a simulation of a two-phase flow of a water drop in air with "comsol 4.2", but I could not, he displays this error "Failed to find consistent initial values. Last time step is not...
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how to create polar plot in journal bearing
hello, need some help from u all to plot these polar plot. these study about pressure distribution around bearing surface of hydrodynamic journal bearing.. radius bearing : 50mm height bearing : 50mm...
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Two very basic questions about direct solvers
Hi all, I have two very basic questions about direct solvers. 1. Why is there convergence problem with direct solvers? I suppose direct solvers inverse the matrix somehow directly, rather than...
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Later version of COMSOL has robuster and stabler solvers
Dear all, I just want to share my recent experience with a convergence problem. During last several weeks I was struggling with convergence problem. The model has two 2nd-order PDE and Electromagnetic...
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When we using meshing?
Hi please help me I started define a waveguide with this software,and i have a question: when we using meshing? friends please help me thanks
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Convergence problems with non-newtonian power law fluid
Hi, I'm modeling fluid flow through a microfluidic bifurcating network. Among other things, I am calculating the volumetric flow rate for a given applied pressure and comparing it to experiment. The...
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Using interpolation to define temperature-dependent material properties
Hi, I am a COMSOL beginner. Trying to added a file containing temperatures and measured material properties and then utilize an interpolation function to define the temperature-dependent material...
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flow boundary conditions: periodic velocity fall and normal velocity zero
Hello, I am attempting to simulate a 2D flow of a suspension of solid disks on a square lattice. To reduce the computational expense of this simulation, I'd like to consider shear on a single disk at...
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Time dependent study convergence
Hi, I am trying to model laminar fluid flow, heat transfer in fluids, and mass diffusion simultaneously in comsol using transient solver. The problem is that when I put the upper limit for time 1...
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function
Can anyone please help to write the above equation Y=X0*(1+sin*(w*t)) where w=2*pi*f (rad/s), t=argument(s) I have tried with analytical function after defining w in variables and all other constants...
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Reading Deformation graph
I am getting a coloured graph for deformation in microgripper. Now I want to get the values of deformation at different point(x,y,z) (instead of graph) please let me know how to get that in comsol.
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New to COMSOL. Help with structural analysis.
Hey guys, I have a 2'' hollow tube that is fixed at one end and has a point load at the other end. (think cantilever) What I need is this: I need the radius of curvature to be 3'', so I need to know...
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Damping factor
can anybody explain what exactly the " Damping factor" in context of COMSOL?
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parameters
Hi everyone, I have a simple question for you. If I have a variable 'D' , coeficient difusion, depends to temperature (T) with the expression D(T)=0.29*T. the range of temperature is (900 kelvin to...
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Using interpolation to define temperature-dependent material properties
Hi, I am a COMSOL beginner. Trying to added a file containing temperatures and measured material properties and then utilize an interpolation function to define the temperature-dependent material...
View ArticleClik here to view.
When we using meshing?
Hi please help me I started define a waveguide with this software,and i have a question: when we using meshing? friends please help me thanks
View ArticleClik here to view.
Convergence problems with non-newtonian power law fluid
Hi, I'm modeling fluid flow through a microfluidic bifurcating network. Among other things, I am calculating the volumetric flow rate for a given applied pressure and comparing it to experiment. The...
View ArticleClik here to view.
Reading Deformation graph
I am getting a coloured graph for deformation in microgripper. Now I want to get the values of deformation at different point(x,y,z) (instead of graph) please let me know how to get that in comsol.
View Article