Temperature at a certain point in a solid structure?
I am using comsol 4 and I found a model of a human body online and I have imported it into comsol. I set up the boundary conditions and get a suitable answer from the slice graphs but I cannot seem for...
View ArticleHow to apply harmonic and random vibration's load?
Hello, I want to know how to apply harmonic and random vibration 's load in comsol v4.2, my previous operation is that first, apply a boundary load, then give a range of frequency, am I right? or...
View ArticleMoving wall boundary condition
Hi, in fluid flow simulations with a moving wall boundary condition (a rotation of a circular surface region), I get strong pressure oscillations at the edge of the rotating part of the surface (where...
View ArticleA problem with two physics.
Hello everyone, I am trying to simulate a simple problem which includes a fluid channel and a piezoelectric splitter. I used two physics: "piezoelectric devices" and "laminar flow", each of them works...
View Articlehuman body with comsol
Hi all, My work consists to perform the calculation of the electromagnetic field (in the terahertz domain) scattered by a human body. My problem is to find the geometry of the human body. I used the...
View ArticleManipulating data in tables
Hi everyone, Such a simple question it seems but I just can't find the answer. How do I manipulate the data in tables? E.g. how to add a column to the table which is abs()^2 of another column? Or how...
View Articlehow to model 128 Y cut LiNbO3 ( piezoelectric material ) in a 2-D domain
In my project, I want to model a 128 Y cut LiNbO3 substrate in a 2-D domain. However, in the coordinate system selection, Comsol only allows me to select, like XY, YZ... Plane material system. But I...
View ArticleError simulating fluid flow through microsieve
Hi everyone, I'm newbie to COMSOL Multiphysics. I'm trying to anticipate when a microsieve is broken under fluid flow (blood filtering), but some errors keep occuring. Please help me! Thanks very much!...
View ArticleFile opening
How can I convert a COMSOL 3.3 file to 4.3a file. Very urgent.......................... Please help me. Has any earth science module in COMSOL 4.3a?: Please help as early as possible.
View ArticleIntegration
Hello, I am using Comsol 4.3b. I arrived in a problem. Could you please help me. The problem is, I have a system of reaction diffusion equation with no flux boundary condition, in which one of...
View ArticleVoronoi 2D network drawing in COMSOL 4.3b
Hi All I am just wondering whether anyone knows how to draw Voronoi 2D diagram in COMSOL. I also require the division to draw with thickness such that it becomes a boundary instead of line. Any...
View ArticleCalculated resistance of a multi turn coil in frequency domain is too high
Dear all, I hope anybody in this forum had the same experience with the multi turn coil domain. In my model i have a simple multi-turn-coil domain. My problem is that the resistance calculated in...
View ArticleFixed Beam Deflection
Hi, I have a circular beam fixed at both ends using "Beam" physics and "Stationary" study. By applying an edge load on the beam I would expect to observe a deflection of the beam. In contrast only the...
View ArticlePML problem in groove waveguide
Hi, I have been trying to simulate the radiation pattern of a small dipole inside a groove carved into a gold substrate (transversal shape is triangular). The simulation box is rectangular, and I set 4...
View Articlemass flowrate is non conserved
Dear all, I was trying to simulate the water flow into a system with two inlets and three outlets and I used the ''surface integration'' io order to compute the total mass flow rate and I found that...
View ArticleProblem with particles' size in particle trajectory plot
Hi guys, I am using particle trajectory module to launch few microbeads from the inlet of a microchannel towards its outlet. The problem is that in the model, I define particle's size as 10 um, but in...
View ArticleDisplay results on a different geometry
Hi, I've got the following problem: I'm calculating the temperature and displacement field in an axis-symmetric pressure plate (basically a circular ring) of a clutch system using the "Weak...
View ArticleHelp with "Nonlinear solver did not converge"
Good day everyone! I am working on a multiphysics problem involving reaction engineering, thermal stress, fluid flow in porous media, and species transport in porous media. At a certain timestep, I...
View ArticleI have two models, model 1 and model 2. When solving model 2, the initial...
I have a question. I have two models, model 1 and model 2. When solving model 2, the initial value of model 2 is the result of model 1. should I set it ? special information as follows: (1) Model 1 and...
View ArticleHow to apply NEWMan BC
Please let me know how to apply NEWMAN BC for a moving wire ? Is there any provision in HT module where it can be applied directly ? -- Ishant Jain R&DSS, TSL, Jamshedpur
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