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Water electrolysis
which modules perfectly match on for water electrolysis simulation? Electric current Electrostatics Secondary current distribution
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Mesh requirements to accurately calculate mass properties
I am trying to model the rotation of a dipole in an electric field. I am using mass properties to determine the moment of inertia, etc of the dipole. I kept getting a divide by 0 error so I've looked...
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Reacting Flow in Porous Media of the Membraneless Fuel Cell
Hi All, Please, I need to simulate the reacting flow in porous media at membraneless fuel cell. Firstly, I am just trying to simulate laminar flow and transport of diluted species. Furthermore, I am...
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Using boundary load condition at an interface in solid mechanics module
Hello, ultimately I would like to solve a problem with two linear elastic materials (each with different Lame parameters) and at the interface between the two materials I would like to impose...
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2D Magnetic Field
Hi, I'm modeling a 2D representation of a stator core, pretty much some steel sheets in a stack, an airgap and then a face of a pole. I want the magnetic flux to flow from the pole and then towards the...
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mphplot(model, 'pg1') command does not work
Hi, I am very new user of COMSOL. I am using COMSOL 51. and COMSOL 5.1 with Matlab. I have a comsol model in comsol GUI. It has a 2D plot with a tag <pg1>. I want to see the graph in matlab. At...
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mass spring system
HI, I want to model a structure in 2D to where two beams are connected with spring (one is above and another is under) and other sides of the beam is simply supported. I want measure free velocity and...
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Force calculation between a multi-turn coil and a permanent magnet
Hello, I'm trying to simulate the force between a multi-turn coil and a permanent magnet. The magnet is inside of the coil. It has to move against a flexure to reach its resting position. Therefore i...
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Smoothing the graph
Hello, could anyone help how to smooth the graph. I have attached the graph that is the derivative of magnetic flux density with respect to phi. I tried my best to make the graph smoother by increasing...
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Dimensionless study comsol
Hi Is there an option not to have units in comsol 4.4 or 5.0. Comsol 3.5 has this option not to choose units. I can't find it in comsol 5.0.. Attached is a screenshot of the option in comsol 3.5
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Font size
Hi folks Is there any other means of increasing the font size than defing large fonts in Windows Control Panel? In our lecture hall the video projector has such a low resolution that the default fonts...
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integrating a scalar field in one direction
The model that i am working on contains a plate that is locally heated. the temperature field is thus non-uniform over the whole domain. What i want is the average temperature in the Z direction...
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help with Magnetic Flux Gradient in mf module
Hi all, I have a problem with the magnetic flux gradient calculation in a quadrupole solved with the mf module. If I simulate permanent magnet quadrupole I use the mfnc module and if I want to know the...
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3 D Geometry design half cylinder with block
Hi, I would like design 3 D geometry which is attached in image file. can anyone help me to design Domain 2 (D2). I am getting struggle to design in Domain 2. Please give me step by step procedure to...
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PCM
I want to model the heat transfer in a PCM. But the problem is that every time I run the model (with the exact same settings) I get different results.. How is this possible and how do I know what the...
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1D Heat conduction PDE for Mars
Hello, I want to model the subsurface temperature profile of a particular location in Gale crater, Mars using Curiosity REMS (Rover Environmental Monitoring Station) data. I have with me, surface...
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Importing parameterized geometries?
Hey Guys, I'd like to import geometries used in a previous model which are partly defined with parameters (certain distances, lengths, radii). Is it possible to import an existing geometry into COMSOL...
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Heat Transfer in Solids Convergence Issues
Hello, I am trying to model the temperature within a copper cylinder that has some power density within it, but can not seem to get the model to converge. Any help/advice would be greatly appreciated....
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Solve for scattered field - perturbation of the precise solution?
Hi everyone! I have a question about scattered field. If I have background field and \some particles(or some another objects) in it. I should than solve for scattered field. But will it be a precise...
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2 inlet in single pipe with 2 different material
I am designing a reactor in which i want to have 2 different material from 2 different inlet but in the same reactor. As shown in the attached figure both the materials mix at the T junction and exit...
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