Comsol with matlab mphinterp out of memory comsol 5.3

#COMSOL WITH MATLAB MPHINTERP OUT OF MEMORY COMSOL 5.3 HOW TO#
#COMSOL WITH MATLAB MPHINTERP OUT OF MEMORY COMSOL 5.3 PATCH#

It was suggested that I use snapshots of static studies (it's Stokes flow, so supposedly that's ok - regardless, that's a different issue), rather than doing time-dependent studies. The issue is that I want to move to 3D, and I think that will become very computationally expensive. No problem so far, this works fine for time-dependent studies in 2D. The inlet provides a velocity for the non-compressible fluid, which pushes the object. I'm trying to simulate a rigid object moving in a rigid fluid-filled channel in COMSOL.

#COMSOL WITH MATLAB MPHINTERP OUT OF MEMORY COMSOL 5.3 HOW TO#

Do you know how to avoid such disconvergencies? Please, share your opinions. I can't explain why is it so? There is no convection at that time point, only diffusion and surface reactions. Also I've tried to set Relative tolerance at specified value from 0.01 down to 1e-5. May have reached a singularity' error for BDF and Generalized alpha time-dependent solvers both.

After the ignition of self-sustained discharge voltage source switching off for the long time about ~ 100 us.Д¬OMSOL successfully simulates the ignition, but after the switching the source off at about 20-30 us from the beginning of the simulation I receive 'Repeated error test failures. The high voltage application time is much smaller than entire pulse period, but it is enough to ignite self-sustained discharge ~ 2 us at low pressure. Anode voltage waveform is represented by small duty cycle pulse train (rectangular + long pause each). The peculiarity of this simulation is in the anode voltage supply. Im simulating low-pressure 2D DC discharge with COMSOL Plasma module. I would be happy to know what kind of expression would be better to model this type of contact to prevent what I think was happening. I think maybe after that one point reaches my displacement limit the spring stiffness becomes zero at all of the points of the contact (not only at the 'x value' I expected and so my model do not converge.

I want to know what is the expression for spring constant (like 'uspring' for it's displacement) to plot it along the contact length and see what happened. During running my parametric study, at a certain value of the parameter that the spring displacement exceeds the 1 limit and the slipping starts I get error. The input values of this function changes along the length of the contact. I determined the spring constant of the thin elastic layer as a function of the spring displacement (uspring) to have a elastic perfectly plastic contact to have slipping displacements. Homi Bhabha National Institute - Raja Ramanna Centre for Advanced Technology, Indore,Д®mail: have two touching geometries and I used a thin elastic layer to model the contact. Junior Research Fellow (Research Scholar), How I define variable that represent z direction displacement. How to write objective function i.e z direction displacement ( deflection of every node from x=0 to L). Error is define as difference of deflection of cantilever beam (z direction displacement) and actual deflection (z_actual = -a + a*((b^2+x^2)/b^2)^0.5 ) at particular location of x (node). This is my objective function and I try to minimize the objective function. For this propose we calculate the summation of square of error at every node along length ( x=0 to L ).

By changing the voltage of piezoelectric I want to match the curvature of the cantilever beam with desired hyperbolic profile.

#COMSOL WITH MATLAB MPHINTERP OUT OF MEMORY COMSOL 5.3 PATCH#

I bend a cantilever beam using 3 piezoelectric patch in hyperbolic shape.

Comsol with matlab mphinterp out of memory comsol 5.3