Specifying lengths while creating geometries
I 'm following this tutorial to create a pipe geometry that branches to form 2 sub branches and coverges again.The geometry is specified by selecting a polygon and specifying the x and y coordinates...
View ArticleCOMSOL Unable to Compute Third Order Space Derivative
Hi, I have been working on a project which requires the evaluation of a third order space derivative term in my 1-D PDE, and this is done using the Coefficient Form PDE module. I found that COMSOL...
View ArticlePlot 4D Comsol 5.4
Hi, I try to plot an interpolating function consisting of x,y,z (point coordinates) and I (which takes values between 1 and 3). I get the attached photo but the domain is cut into a cube shape, when in...
View ArticleExciting Surface plasmon polaritons with a point source
Hi, I am new to COMSOL and would like to know how to excite surface plasmon polaritons using a point source place the the metal-dielectric interface.Thanks, Ashwin
View ArticleRegarding Mode Analysis
Hello Everyone, I am very new to this field so can anyone please suggest me how to model Rectangular Waveguide(WR 90) for mode alalysis so that i can estimate S parameters of composite materials?
View Articleextracting information with mpheval() - ndgrid vs meshgrid
Hi,I could not easily find anything about this topic, so excuse if I missed something.In page 288 of the LiveLinkForMATLABGuide, there's an example of how to extract information using mpheval() with...
View ArticleElectrophoretic Deposition
Hello everyone,I would like to simulate AC electrophoretic deposition of SiC particles in COMSOL. Is it correct to use the electrodepositon module?
View ArticleCoefficient form PDE: Ergun equation
I am trying to study on the pressure drop along the adsorption column by solving the ergun equation via the PDE. However, the simulation resuls shows no pressure drop. Anyone know how can I solve this?
View ArticleParametric sensitivity analysis
Does anybody know how to do Parametric senstivity analysis in comsol 5.3a?
View ArticleGradient of the magnetic field is zero
Hi forum,I'm relatively new to COMSOL and am trying to plot the gradient of the magnetic field from a 2D block magnet in the Magnetic Fields, No Currents (mfnc) physics module, along with a Coefficient...
View ArticleSurface integration for gold nanoparticle
What is the expression for surface integration of gold nanoparticle?
View ArticleSchottky drain current of 2D material FET
Hi Forum, I'm trying to plot the schottky drain current varying by applied gate voltage in WS2 FET, which has p-type doped Si substrate and WS2 channel. Although my design give pretty much accceptable...
View ArticleIncluding gravity effects in CFD simulation
Hello everyone!I am modeling laminar flow through a vertical pipe whose inlet is at the base of the pipe. The outlet is normal (90 degrees) to the pipe. The pipe is vertical along the z-axis. My...
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Radiation Boundary Condition for Wave Equation in Coefficient for PDE
Hi, I'm currently working with a 1-D wave equation in the Coefficient Form PDE physics. I want to specify a boundary as an open boundary/ radiation boundary as I do not want any reflection of the...
View ArticleRegarding the expression of normal to a curve of 3D surface.
Hi All,I am working with a 3D-Block (Picture attached). Over this 3D block, there is 2D curve PQ, embaded in ZX-plane Now I wish to specify some perticular condition along the normal to the curve PQ in...
View ArticleObtaining The Co-Ordinate of Point with minimum value of a Expression
Hi All,I have an 3D geometry. In the 3D geometry, I have a curve PQRST in ZX- Plane (Image attached). I want to calculate the value of a perticular expression (Say, EXR1), at each point of the curve...
View ArticlePrescribed time dependent displacement
Hi!I am currently working on making a peristaltic pump and analyzing the influence of different parameters. In order to analyze different heights to which the pump closes and opens again, I want to...
View Articlecoefficient form pde
i was going through a comsol file. It has coefficient form pde implementation. for defining the diffusion coefficient c, the value entered is0.001*D11(x,y,z)where D11 is a interpolation function . What...
View ArticleHow to construct a Hexa-/Octa-gon 3D "cone" in comsol
Dear all,For my heat transfer in soild model, I am trying to study the thermomechanical behavior, e.g. bulk temperature distribution and structure deformation, of some solid structure due to heat...
View ArticleMagnetic field simulation of a Quadrupole
Hello, I am using the MagnetFields module to simulate the magnetic field of a permanent magnet quadrupole arrangement. 1) I am now wondering why the result of my 3D plot (streamline) ist not...
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