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COMSOL on a dell T630 server, too slow

hi,everybody. I have just buy a new dell T630 server with 16 intel cores and 64GB RAM. COMSOL is running extremely slow on it and even slower than a old PC with only 4 cores and 4GB RAM. There must be...

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how to simulate ion trajectory with multiple fields

Hi, I'm trying to simulate ion trajectory for optimization of voltage on my ion optics. But the problem is that there is not only electric field, but magnetic field, which seems quite rare. In my case,...

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If Statement

Hello, I am trying to use an if statement or something similar to apply forces at different times, but I am not sure how to do so. My goal is to compress a figure for a certain amount of time, and then...

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Injection flow into Microfluidic Device

Hi- I'm pretty new at comsol. I am trying to model a simple microfluidic device with a center well for injection that flows out into 8 wells evenly spaced around the center like a star. What I am...

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Near-field magnetic field simulation of RF antenna

Hello, We are trying to maximise the magnetic field produced by a loop antenna driven at 300 MHz, at a distance of ~20 cm from its centre. We wish to simulate it both in free space, and with a sheet of...

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Polar moment of inertia of cylinder with slit

Hello, I am trying to obtain values for a complex shape (to begin with, a cylinder with a rectangular slit through it). How is it possible to do this? Thank you! Andrei

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Heat Flow - Stationary vs Time Dependent study

Good Evening, The mph files for both are added below. My model is shown in attachment (3). It consists of a copper strip on a piece of GaAs which rests on a heat sink made of copper. A 20 V Voltage...

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*Now Available* COMSOL Multiphysics 5.1

Hello COMSOL Community, COMSOL Multiphysics(R) 5.1 was released on Wednesday, April 15. Version 5.1 is the first and only integrated simulation environment that lets you build multiphysics models and...

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Electric Current Flow in a 2D surface

Hiii, I was wondering if I can get the electric current flow on a 2d surface. Say there is a rectangle. I want to give current at one corner and take out the current from the opposite corner and see...

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Calculating current from current density..

hello, could anyone help me how to calculate current from current density.

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Mesh memory for large model in parallel computing

Hello everyone, I have a problem with solving a large model in parallel computing with comsol. I have a distributed-parallel processing system with 6 nodes, each has 16 cores. And i have 128 Gb of...

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workstation for comsol

Hello, i plan on buying a new workstation for COMSOL 5.0. Area of research would be mostly acoustics in general with a wide range of different studies and up to sth like 10M DOFs. Its only possible to...

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Stress Analysis after annealing

hi,I am a newcomer I am doing a project .I need to anneal a silicon wafer first. then how can I analyse the internal stress of the silicon wafer by comsol? Thanks very much Chang

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Convective heat transfer coefficient

Hi everyone, I'm a beginner in Comsol and I have a very simple problem I can't find a solution for. Basically my model is in 2D and is very easy: I have an horizontal plate from which is flowing a heat...

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What exactly is a point probe (3D) measuring?

I'm solving a reaction-diffusion model in a 3D geometry consisting in a simple sphere (radius 10 mm) with some point sources in its surface. I've configured a point probe right in front of one of those...

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Time dependent laminar flow past circular cylinder

Hi, I am trying to solve time-dependent laminar flow past a long circular cylinder at Re=100 in unconfined condition. I am using rectangle domain. The boundary conditions employed for inlet is the...

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calculating the resistance of a wire

Hi Can anyone help me with calculating the resistance of a wire using AC/DC Module>Electrostatics(es)? it's totally simple using Electrical Currents(ec) physics, how about (es)? Thanks

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How can I plot 1D-line along a self defined line?

Hallo everybody, I have modeled a concentration distribution in a cubic 3D-model and want to draw the trend along a self defined line. I tried to create a 1D-line under 1D-plot group and couldn't...

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rounding heat flux

Hello, I would like to make a heat flux turn around a circle, and I don't know how. Could you explain me please? More precisely, I would like to make a Gaussian pulse turn around my circle, but it's...

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How to apply normal stress on a solid box cube ?

The thing is that we have to study deformation in solid cube . How to we study ?

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