Phase change + tube filling
Hello everyone,First, sorry for my english, it is far from being perfect. I hope I'll be clear enough concerning my problem.I am actually a new COMSOL user and I would like to know if the specific...
View ArticleDraw Schematics in COMSOL
Are there any forum-recomended solutions to draw electrical circuit schematics? I'm surprised COMSOL doesnt do this [unless I've missed it??]I routinely make mistakes when I name nodes and find myself...
View ArticleHow does comsol cycle to assign values to material properties?
I calculated the stress distribution by comsol. Through the force-magnetic coupling equation, how to calculate the permeability of each point in comsol and assign it to the value.
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Can I simplify AC calculating by using one period data repeatedly?
I'm trying to calculate an alternating electric field and simulate how charged particles move in it. Through my calculating, I find that it takes much time to calculate the AEC(alternating electric...
View ArticleDerivative respect to a parameter
Hi everyone! I'm trying to solve photon migration problems in 2D and 3D, using te Coefficients Form PDE. I need to analyze the variation of the solution (u) respect to a parameter (a). How can I do...
View ArticleCoupling Fluid-Structure Interaction with Free and Porous Media Flow
Hi all,I am looking to use the Fluid-Structure Intereaction multiphysics (comprised of laminar flow and solid mechanics) with a porous structure. I have been trying to couple Free and Porous Media Flow...
View ArticleSolution of error: Maximum Number of segregatec iteration reached.....and...
Hello everyone, Here i want to discuss some errors that i am facing while running COMSOL Multiphysics 5.3a for simulation of metal hydride reactor. I have used two Physics interfaces 1. heat transfer...
View ArticleErrors with semiconductor simulations at bias voltage around 40V
Hello all,I am simulating an uniformly doped semiconductor material, and I need to apply a bias voltage of 30-40V through a metal contact. I need to simulate its time response. I could run simulations...
View ArticleActive/passive component use in electromagnetic
Hi, I want to design in practical a ring resonator on substrate like rogers rt duroid 5880. With those rings, I want to use some passive/active components as well in order to improve performance. This...
View ArticleRegards Mesh Size
Dear All, I am beginer of COMSOL, I am using COMSOL 5.4. I have some quaries about use of mesh in the physical structure. 1. I have swept problem in mesh using in 3D structure. 2. I used maximum mesh...
View ArticleThermal Stress in Composite Cylinder
I am solving a composite cylinder problem with two different layers. The coupling of linear elastic material 1 and 2 and its simulation is obtained correctly but as soon as I add the thermal conduction...
View ArticleCapacitive pressure sensor
I want to simulate a capacitive pressure sensor where two thin nickel of radius 6mm sheet are used as two opposite electrodes. CNT coated composites are used as main filler material between two...
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How to apply solid species transport in Comsol?
When using Transport of Diluted Species in Porous Media (tds), the general equation can be:where is diffusion and is convection or advection.Now I want a solid species that works in the sediment itself...
View ArticleHow to do multi track modeling?
Hello, I am doing laser based powder bed fusion modeling in COMSOL. I know how to do single track laser modeling, but I am facing some issues with multi track laser. I have actually been able to create...
View ArticleSeparating subdomain from domain
Hello,In my model I have an extrusion from a Work Plane that is immersed in one of the primitive 3D shapes. After completing all my operations, a form union/assembly joins them as one domain. How do I...
View ArticleThe moving mesh in Rotating Machinery Magnetic
I am simulating a permanent magnet motor in rmm in version 5.4. I defined rotor with moving mesh. I give it a constant revolution per time. When I export the animation with stored solutions (sequence...
View ArticleMultiturn coil_time based simulation_Pulseshape based voltage
Hi everyone,I have simulated a multiturn coil (with a Yoke) using AC-DC COMSOL 5.2. The DC simulation does show a succesful simulation results with a magnetic field lines (streamlines) generated...
View ArticleNo Convergence
Hello, I am new to Comsol and I am trying so simulate the follwing:A piece of hyperalstic material is placed on top of a rigid body. The hyperelastic materials is then deformed under the gravitational...
View ArticleError - Division by zero
Hi, can anyone help me. I am trying to set a temperature on a boundary surface. With a constant parameter it is running, but I want to it with the equation of Clausius-Clapeyron. For this I set an...
View ArticleNumber of Allowed "Release from Data File" Nodes
I am currently simulating the optics of an implantable LED-lens system. Here, the LED has the shape of a hexahedron (Picture of LED attached). Five faces of the LED serve as ray sources. My plan is to...
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