open .mat file in comsol
Hi all, I got couple of files which are in version of 3.5a, and the file extensions are .fl and .mat. I can open .fl through comsol, but I don't know how to open .mat in comsol, which can be opened...
View ArticleDerived values in different tables instead of in 1 table
Sometimes the derived values are comming in 1 table when doing the clear and evaluate all. But sometimes all the different values are comming in different tables which is not usefull to work with (copy...
View ArticleWaveguide spot size converter
Hi, I am trying to setup a 3d model, using the Wave Optics Beam Envelopes Method, for simulating fiber to chip coupling using a waveguide spot size converter. The waveguide is only tapered in the...
View ArticleElectromechanical Response of Comb Drive and Folded Spring
Hi, I am trying to simulate the electromechanical response of a comb drive capacitor and flexure folded spring. However, I have been struggling with creating the proper meshing and receiving the...
View ArticleLinear elastic material
Hi, I implied two linear solid mechanic (linear elastic material) in two rectangular(( Rectangular1)and rectangular2 ) ), there is a common inner boundary( number 2) between these two rectangular, i...
View ArticleMaximum value at each point
Hi there, I'm fairly new to Comsol so please excuse me if the question is trivial: I have modelled the temperature profile in 3D for a slab that is heated intermittently from either side. What I now...
View ArticleMixing of two different fluids
Hello, I want to model mixing in a passive mixer (suppose T mixer) with two different fluids (suppose water and ethanol) entering through two inlets and getting mix. I am not able to perform such...
View ArticleOil Tank wtih heater
Hello, I am a new Comsol user. I am trying to model an oil tank heated by a U heater.The heater use oil at a higher temperature. The cold oil in the tank is at 30°C and the hot is at 250°C.I use...
View Articleasymmetric model (Ex. cylinder) in 3D, 3.5a
How to draw a asymmetric model (Ex. cylinder) in 3D. Thanks, Vinay Patel.
View ArticleCalculating Magnetic Flux in COMSOL
Hello, Is there a way to calculate magnetic flux through a surface in COMSOL? I suspect calculating magnetic flux involves either "Subdomain Integration" or "Boundary Integration" under the...
View ArticleConstraint definition in Weak form PDE in v4.3
Hi, I am trying to convert a Comsol 3.5 model that used the 'Weak form:Subdomain' mode into Weak form PDE in v4.3. I have the following two questions: 1. In v3.5, certain subdomains were defined with...
View ArticleUsing Quarter Symmetry
Hi I having problem using symmetry to simulate my model. For example I have a 3D ring and I want to use the quarter of the model to reduce the computation time. But how to use the quarter of the ring?...
View Articlecomsol 3.5 Capacitance and permittivity calculation
Hello everyone, I 'm new to comsol and I've been trying to model a simple parallel plate capacitor with a mixture as dielectric. I wish to obtain the effective permittivity value of the mixture. Since...
View ArticleHelp me! Error"Internal error in boundary respecting."
Hi, all I want fix it, It is coordinate (-2,06378, 1,35209, 2,8034) Thank a lot Vinh Nguyen
View ArticleHow to measure the distance between two objects in COMSOL
Hi All, Can anyone tell me how to measure the distance between two objects in COMSOL, such as the distance between to surfaces, distance between one surface to another body? Thanks.
View ArticleHelp with the Laplacian definition (second derivative)
Hi I want to do the laplacian of the hydrostatic pressure, which I've defined as the trace of the stress tensor / 3 (solid.I1s/3), but i've a problem,when i define the following expression :...
View ArticleTorque in Stirred Mixer
Hi all, Can someone help and tell me how to calculate torque in Laminar Flow in a Baffled Stirred Mixer model? Thanks a lot.
View ArticleModeling nanoparticle heating
Hi, How do i model multisource nanoparticles heating in COMSOL.
View ArticleOptimize time of simulation
Hi! I'm simulating a grounding system with AC/DC model of COMSOL v4.3 and having trouble with simulation time. I use more than 100 probes and constant time step. In the initial micro seconds the...
View ArticleHelp: Why is Initial value changed after calculation?
Hello, everyone. I build two models （both are PDEs）in one file. For the first one, initial value is A0, a log-normal distribution. For the second one, initial value is B0, also a log-normal...
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