Recent content by Mohamed_Wael

I really don’t understand the advantage of 3 phase flow, phase field module in comsol. For example, if I want to simulate a compound droplet inside a fluid. Can’t I use the moving mesh with 2 fluid-fluid interface? If yes. When should I use the 3-phase flow, phase field simulation?

I have been simulating a 2D particle/droplet motion inside a larger emulsion using Comsol where the flow field inside the emulsion is calculated from a moving mesh laminar flow simulation. my problem is: I always get an undefined variable error " Variable: comp1.w" however this variable is the...

I am a TA for Automatic control class, I can't find an answer for my students about why we are still studying Routh-Hurwitz criterion as almost anyone can use computer software to find the roots of the closed-loop system and determine stability instead of doing these tedious hand calculations

I am studying the modal analysis of a mechanism and I am only interested in the transverse modes, I wonder if there is a way to formulate my problem so that the results show only the transverse modes without the torsional and longitudinal ones, this would help in the post-processing a lot.

I am doing FE analysis for symmetric shape in boundary conditions and geometry, I would like to know if I can use symmetry in my analysis or not. I have tried to run trials, the results are very similar but I am not sure if this just a coincident

I want to determine the natural frequencies and the mode shapes of the given mechanism ( it consists of 2 inclined beams connected together by a compliant link, the bottom end is fixed and the upper end is a roller support). I have done Finite element modeling but I need to get some analytical...

Is there any factory layout software that can import machine drawings from Autocad and easy to learn ?

I am doing surface failure analysis for a ball bearing SKF 6025, , as an exercise, It has been used in the washing machine tub, after some time a noise has been reported and it is no longer rotating. When i got it I opened the seal and captured the attached photo. I had a feeling that it suffers...

Hi all, I have been simulating the following rhombus compliant mechanism using Ansys Modal analysis to have a quick understanding about its mode shapes,,,, the problem is that the deformation is extremely large you can see this as the scale is (*10^-5 ) . This result is for sure unrealistic but...

How can we determine the system properties (natural frequencies & damping ratio ) practically using forced vibration? One way is to measure the phase angle, using the bode plot, the exciting frequency corresponding to 90 (deg) phase shift should be the natural frequency, are there any other...

I wonder of the air has resonance frequency or not, if yes what would happen if we excite it at this frequency

If I am using a new material in ansys, let's say I assigned it as solid linear elastic and I assigned density, young's modulus and poisson's ration and then I applied large deformation for this material so that it should be experience non-linearity ...I wonder how Ansys can give the results...

I am doing a 2D Ansys workbench simulation ,it is nonlinear simulation due to frictionless contact, there is symmetry in the shape so I used the symmetry option to reduce the computation time and it succeeded to converge after that I tried the simulation of the whole body but it always fails...

thanks for your answer, actually we need to measure this low voltage because we have very small pressure drop just 10 mmHg ! can you suggest an amplifier because my background is mechanical and not electrical. thanks

I am a mechanical engineer who is doing an experiment to measure a pressure drop across a microchannel, the sensor is measuring around 30 microvolt/mmHg which is very low value. I would like to know if the voltmeter can read this small value or not and if not what are the alternatives so I can...