16 June 2021 1 1K Report

I want to plot my results on an arbitrary boundary around a cylinder as in the attached picture. how can I have such an arbitrary circle dataset along the axial direction? I mean some circle around cylinder axial direction.

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How to read an HPLC report?

I have four HPLC graphs (for methyl ethyl ketone (MEK) and sulfuric acid and little organic monomers) and I want to analyze them. Is there anyone who can help me with this?

23 December 2020 6,180 3 View

How to mix a gas with different amounts of water vapor?

We want to measure the dew point of a gas (e.g. Argon). We want to measure it when the gas is mixed with various amounts of water vapor. We have the sealed (Argon) gas holder. How can we produce...

03 October 2020 4,598 8 View

The characteristic length of a vertical sinusoidal wall with natural convection?

What is the characteristic length of a vertical sinusoidal wall with natural convection to calculate Rayleigh number? (x represents characteristic length in the attached formula)

21 September 2020 8,736 5 View

What drag model for simulating a fluidized bed with geldart D particles do you propose?

The minimum fluidization velocity is 1.17 m/s and the average diameter of the particles is 2.6 mm with a sphericity factor of 0.9 I am using an Eulerian-Lagrangian approach and these are the...

02 August 2020 646 2 View

How to define a wave port in HFSS transient analysis?

I am doing a transient analysis on a horn antenna using HFSS transient. I know that I need to define a so-called ground plane to which the wave port is attached and that is how I would be able to...

27 July 2020 552 3 View

I am searching for "Model order reduction of nonlinear systems". how can it be possible?

I have a complicated 4th order nonlinear differential equation for a system. I am going to design a nonlinear controller for this system. is it possible to reduce it into a second-order system?...

28 June 2020 930 14 View

Is it possible to model the non-Newtonian Lubrication in comsol?

I want to know that is it possible to model the Bingham lubrication in Hydrodynamic module or thin fluid film module? or mabey I should use another module? #nonnewtonian lubrication #Comsol...

26 June 2020 1,715 5 View

How can i simulate the non-Newtonian lubricant for Hydrodynamic bearing in Comsol multiphysics?

In Comsol multiphysics, the bearing can simulate by Hydrodynamic bearing or thin fluid film module. But when I want to add a constitutive equation for viscosity the shear rate can not appear as a...

15 June 2020 4,948 3 View

How the transport experts define a transportation model?

a transport model (e.g logit model or ...) is based on statistical data and field works or merely based on mathematical theories or both of them? If I want to define a model ( e.g. a new model in...

19 May 2020 1,768 3 View

Numerical Modelling of Natural Convection using Comsol: 2-Step solution or 1-step?

I am modelling air natural convection in a vertical channel with open boundary end by means of Comsol Multiphyscis. I am interested in the stationary solution. There are two different approaches...

03 March 2020 5,686 7 View

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