How to calculate forward Scattering cross section of infinite 2d array
I want to calculate forward scattering cross section of 2d infinite array. I know how to calculate total scattering cross section, but for forward scattering cross section i am confused. Can someone...
View ArticleSingle-turn coil gap feed problem
Hello, I am trying to model gradient coils for use in MRI. I created a saddle coil geometry and I tried to run a study with the current direction specified by gap feed, but it fails to find a solution....
View ArticleMulticore and Cluster Computing
Hi all, One simple and basic question! In comsol by default, number of processors is: 8, in preferences. Let consider that my model with 8 processor takes 1 day to simulate my project. If I change the...
View ArticleUpdating Variables During a Simulation
Hi I'm trying to run a Laminar Flow simulation where I have coupled my outlet boundary conditions to a set of boundary ODEs. I am however getting an error "Failed to evaluate variable Jacobian". I...
View ArticleRun not reproducible
I have a model (attached). I open it, compute results, and export the nodal pressure data. I then re-open it (without saving), compute results, and export the nodal pressure data. The two sets of nodal...
View ArticlePhase change of a metal with version 4.4 and version 5.0 does not match why ?
Hi I am trying to make a simulation of a melting process of a square of Silicon 0.5m x 0.5m fixed temperature of 1941K to the left wall and 1687 K (melting point of silicon) to the right wall ( this...
View Article"Contact Pressure" vs. "Pressure"?
When I compute "contact pressure" and "pressure" on the contact boundary and export the data, I get different answers (attached). Does anyone know how does COMSOL caluclates "contact pressure"...
View ArticleUser defined PDE
Can someone write the attached PDE in its coefficient form. Regards Subramanian Aiyer
View Articlefilling air in the gap of a microgripper
Dear Sir, I'm trying to analyse a microgripper on comsol. i have been having trouble assigning air bw the two gripper arms and hence the electrodes. and i think because of this i havent been able to...
View Articleerror limit set
i saw this in Comsol 'Help' menu. 'The default setting is tol, in which case the segregated iterations are terminated when, for each group, the estimated error is below the corresponding tolerance set...
View ArticleExplicit Solid Mechanics
Hi I have a solid mechanics problem comprising a hyperelastic material (Mooney-Rivlin(2 params) that is placed under compression resulting in large deformation. The construction is such that contact...
View Article"Failed to find consistent initial values" error after increasing time range
Hi, I'm trying to model a Fuel cell in Comsol (MEA, 1D and time dependent). There is no problem for a range of time (range(0,3,2380)). However as I increase the time range. I get the "Failed to find...
View ArticleDeformation of a water droplet in a cilindric pipe with a toluene flow
Hello, I'm new in Comsol and I'm trying to solve a problem for an exam. I have a droplet of water placed on the axis of a cilindric pipe, and in the pipe flows toluene. I have to evaluate the...
View ArticleDeformation of liquid droplet
I am new to COMSOL, so I am referencing a work on deformation of liquid droplet impacting a solid surface. I tried to recreate the same model as that work. But I ran into several problems. As I tracked...
View ArticlePlasma chemistry assumption
Hello everybody I am modelling a plasma actuator used for aerospace application (boundary layer separation control, airfoil leading edge flow separation control). I am having a trouble in finding any...
View ArticleHow to enforce minimum gap between two vibrating structures- FSI
Hey, I am working on vocal fold aerodynamics. I am trying to perform 2D Fluid Structure Interaction simulations in which the air flows between the two vocal folds. The gap between them is very...
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