relative permittivity of gold at 900 MHz frequency
Hello all,what is the relative permittivity of gold at 900 MHz frequency?Thankyou
View ArticleImport data file from excel to Comsol
Hello,How do I import a set of data from excel to Comsol?Thanks in advance
View ArticleHow to create identity boundary pair in RMM physics
Hello,all I am simulating a pm motor in comsol Multiphysics, I use the rotating machinery magntic, I imported the dxf document. While I am defining the identity boundary pair, the source boundary and...
View Articlesavings problem
Hi Sometimes It happened to me that when I want to save some big simulation (usually 3D simulations) the savings goes really slow and it may doesn´t end and so I loose everything. Do you have any idea...
View Articlevibration plate
Hello, I want to simulate a mechanical plate that vibrates in the (vacuum, air, water), I want to have air flow inside "velocity field", and the components of V (x, y, z) . Could you guide me how I can...
View ArticleConversion relationship between TNT equivalent and explosion pressure
P0=140e6[N]*(Q/1[kg])^(2/3) "Load magnitude"Hello everyone, I am having a problem now. I don't know what kind of physical quantity 140e6 is in the formula. How did it come from? Seek answers from the...
View Article"Measure" in Matlab Livelink
How can get the length, area or volume of geometery using "Measure"(or another way) in matlab livelink?model.component('comp1').geom('geom1').measure.selection.init(2); Length =...
View ArticleUltrasonic reflections of neural dust
Hello all,I am trying to model the operation of neural dust, as described by Dongjin Seo et al: Neural DustI've set up my model with 3 components: ultrasonic transmitter, propagating medium and...
View ArticleScattering on rigid object
I simulated the acoustic scattering of a plane wave on a rigid object in free-field and computed the total pressure at one point on the object's surface. I used Comsol's acoustics module and Boundary...
View ArticleUndefined Variable
HiI am trying to model the heat transfer performance of a helix electric heating element in a packed bed with air flowing into the bed. The heating element is inside the packed bed. When I run the...
View Articlehow to make microstrip antennas behave like transmitter and receiver for...
hello all,I have 5 microstrip antennas situated in a circlular shape. That means, they are facing each other in a circluar shape. I want to make one antenna to transmit at one time while others will be...
View ArticleHow can make the shared boundaries in identity boundary pairs
Hello,all I am simulating a pm_motor in comsol Multiphysics, I use the rotating machinery magntic, I imported the dxf document. While I am defining the identity boundary pair, the source boundary and...
View ArticleNonlinear conductivity
The below post is related to an archived discussion[I am orking on ZnO arresters. I would like to know how input the non linear conductivity of the ZnO material. It is dependent on both temperature and...
View ArticleFluid-structure interaction of a rod in 3D
Hello,Comsol has a 2D Fluid-Stucture interaction example in it's application gallery such that a filament in a 2D channel gets deformed once it's subjected to fluid flow...
View ArticleEigenvalue solver in Coefficient Form PDE physics
hello, i had solved eigenvalue study in Coefficient form PDE physics.i got the solutions but i Dont need complex Eigenvalue.is it possible?
View ArticleThin Film Flow (Cut Line)
Hi-I have a thin film flow approximating a lubrication bearing. I want to create a 2D plot of pressure on axis and angle on the other. I am aware of how to use cut line 2D on a 2D surface to make a 1D...
View ArticleTunnel excavation
I want to research the effect of tunnel excavation on deformation and stress distribution of surrounding rock, but when I use Parametric scanning to change the long of the tunnel, I find the long is...
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Calculation of the Curvature (Did the help file go wrong?)
When I studied the calculation of curvature in the Microfluidics Module User' Guide, I found that the software used different methods when using level-set model and moving-mesh model. The former uses...
View ArticleHow to calculate the transmission coefficient of the radome ？
Could you give me some advice about how to set the boundary conditions and antenna excitation port?
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