I am really new to Maxwell and I have possibly very beginner like question.

I am doing the steady state analysis of the synchronous machine using RMxprt and Maxwell.

I entered the machine data into RMxprt and exported the design into Maxwell.

I wanted to verify the RMxprt results by doing FEM analysis in Maxwell.

However, since RMxprt exports the design ready for the transient analysis, something strange happens when i switch the solution type to magnetostatic analysis.

I think something is wrong with the boundaries, and I am not certain how to solve it.

This is the result I get while using the RMxprt defined boundaries.

It is clearly incorrect on many levels.

As you can see, Maxwell defined Vector potential = 0 on the outer diameter of the stator, and the Master - Slave boundaires at the edge of the half of the generator.

I have read that I should define symmetry even/odd boundaries at the point where stator/rotor intersect with the air gap, but I haven't been able to do so properly and get any reasonable result.

If someone can explain me simply how the boundaries for the synchronous machine look like, I would be very very thankful. :) ]]>

I am currently working on simulations of conjugate heat transfer problems. The partitioned approach was used, i.e., solving heat conduction in the solid domain and convection in the fluid domain separately with a coupling provided by a pair of BCs at the solid-fluid interface.

I have implemented a Dirichlet BC for the solid domain and a Neumann BC for the fluid flow. What I want to do now is to update the solid BC after a couple of fluid flow calculations. I have no idea about how to handle the two different time steps (solid time step and fluid flow time step). What should I do? ]]>

So, i am looking for a behaviour similar to this function that does not require a rendering context to be created, i have attempted simply iterating over the slices in a for loop, but this doesn't progress the slice used in the filters for processing so each time a save is attempted it is of the first slice.

I have searched high and low for a possible solution but have not found anything! Any guidance you could provide would be greatly appreciated! ]]>

Could you please help me to draw a 3-D Cross shape with rounded edges , the supporting arms, as that shown in the attached picture, using ANSYS design modeler?

Can anyone please tell how to get/print the co-ordinates of nodes in ICEM? ]]>

I know how to calculate

Thanks for your time,

g. ]]>

The theory of this would work like this: My gears have 23 teeth each, and with my given time step size, it will take "n" time steps to complete a revolution of both gears. Before running the simulation, I could create 23/n meshes, each corresponding to a different time step. At each new time step, Fluent loads the next mesh in the series. When it gets to the end, the gears are in the same position due to the axisymmetric condition and fluent loops back to the first mesh and then repeats.

I'm new to Fluent and haven't found my answer in the theory guide or user guide. Can someone point me in the right direction to get started? ]]>

Can anyone please help me to fix this. I am really stuck in the middle.

The definition in Fluent states that the heat flux in the x direction includes effects of the temperature gradients in the y and z directions. How can the temperature gradients in the y and z directions affect the heat flux in the x direction? ]]>

I am simulating a 2D cavity flow using icoFoam and I want my top and bottom walls to move periodically.

Utop=U and Ubottom=0 for nT< t <(n+0.5)T

Utop=0 and Ubottom=U for (n+0.5)T< t <(n+1)T

Basically T is period and n is period number. During each period for half the period top wall moves with constant velocity and then for remaining half period bottom wall moves.

What I used is

topMovingWall

{

type groovyBC;

storedVariables

(

{

name n;

initialValue "0";

}

);

variables

(

"tperiod=20;"

"n = (time() % tperiod == 0) ? n+1 : n;"

);

valueExpression "vector((time()>n*tperiod && time()<(n+0.5)*tperiod)?0.01:0,0,0)";

}

bottomMovingWall

{

type groovyBC;

storedVariables

(

{

name n;

initialValue "0";

}

);

variables

(

"tperiod=20;"

"n = (time() % tperiod == 0) ? n+1 : n;"

);

valueExpression "vector((time()>(n+0.5)*tperiod && time()<(n+1)*tperiod)?0.01:0,0,0)";

}

For n=0 it works and I get wall motions but my n is not incrementing when a period of T (denoted by tperiod) gets over. ]]>

I'm trying to simulate an annular diffuser (pre+dump diffuser, see pic) of a combustor. The simulation is in 2D axisymmetric. I have used several turbulence models including k-epsilon, k-omega and RSM. It seems to me that the predicted total pressure loss at the pre-diffuser outlet (i.e. from 1-2 in the pic) is significantly lower than the experimental value (about 50% lower). The y+ of the mesh is lower than 2.5 which I think should be okay and finer mesh didn't make any difference. I also used the inlet velocity profile obtained from the experiment as the inlet condition.

What do you think could possibly be the reason? I 've also noticed that by increasing the inlet turbulent intensity, the total pressure loss could increase. If that's the case, what intensity is suitable with a Re=2*10^5 and inlet height=38.1mm. I initially set it to 4% but the predicted total pressure loss was too low.

Thanks for your suggestions.

Alice

I am building DEM-CFD model with MFIX software. In DEM model, there are two selection to define the number of particles. One is use the present code to automatically and randomly generate it, the other one is to specify the number of particles, such as 20,000 particle in a fluidbed. From MFIX, there is a fortran code which tells how to specify the number of particles, but i have no idea that how to use them to generate a .dat file.

I put attachment down here, kindly have a look. The .f file is the fortran code for specifying the number of particles, and in this code, 20.000 particles are defined.

Note: the particle_input.doc is not the .dat file due to it is invalid file to upload, but i list the part of contents in this .doc file. I need .dat file to define the number of particles.

I need you guys to help me how to generate the .dat file on linux by using the fortran code.

Thank you very much.

best regards

I want receive velocitygraphs in some points.

I have 26 simulations and I have to read parameters in 80 points.

How I can write coordinates of these points in Ansys Fluent using console?

I was looking for in Help, but I haven't received the answer.

Please, this is very important for my University.

Thanks in advance!

Greetings,

Mat ]]>

I am using StarCCM+ to simulate 2D flow around a cylinder,

Using flowing models:

Coupled flow

Laminar

Gas

Constant density

2D

My plot for Cd damps to one value rather then oscillating.

Any suggestions why this could be happening? ]]>