Learning Forum

[Pluto922]

After calculating fluent DPM, how can I show the mass conc of the solid particles on some cross plane?

[Rob]

I find contours to be quite effective. 

[Pluto922]

Thank you. But I used the contours of pressure, density, velocity, turbulence, discrete phase variables, discrete phase sources, properties, wall fluxes, cell info, mesh, residuals, derivatives and anyone could show my wanted. Wasn't my DPM model coupled?  However, I could see my solid particles tracks in particle tracks. 

[Rob]

Couple the particles and run the model until you have an update on the tracks. Concentration should now be available. Remember the DPM is Langrangian on the Euler fluid solution. 

[Pluto922]

Hello, Please look at the above picture, I think my DPM model effectived. But look at the next picture.

I used the contour show the particle mass conc in picture one's shadow plane,and the conc is 0. What's wrong with this?

[Rob]

Can you replot with node values off? 

[Pluto922]

Sorry, I can't. I used Post in CFD-Post and I don't find the option about node values. Do I need Post in Fluent?

[Rob]

Ah, do the post processing in Fluent. CFD Post doesn't work as well especially with particle tracks. 

[Pluto922]

Ah, thank you.

But I had a try and find my coordinate axis have value and my picture still is 0. What happened with that?

[Rob]

Can you post a screen shot of the DPM panel? 

[Pluto922]

Of course.

And I have another 19 injections what has different locations.

[Rob]

That's more or less the same set up as I'm using on a client case. Can you replot with local range and turn off node values. You may also want to increase the number of streams as 2 per cone is a little coarse and I'd set the start/stop angle to 0 and 359 degrees. 

[Pluto922]

Sorry, I'm just a beginner of ANSYS. So, I reploted and turn off node values.

Then I get the next picture.

But I can't understand this picture and I want to get a picture that could show DPM conc on all plane as outlet_1 or outlet_2. What can I do for this?

[Rob]

Go to the contours panel and plot the contour you had earlier, but with local range and with node values deselected.  The scatter on the xy plot means you have a DPM Concentration, so the model set-up is mostly there. 

[Pluto922]

Thank you. And I don't find local range  in my contours panel, so I try to select auto range.

Maybe I made it ! I used R-R distribution in DPM model and then I could get a picture of DPM conc on outlet plane.

However, selected node values and not, the DPM conc max is different. Why? What is the true number?

[Rob]

Not global is local: may not translate well or be as obvious as I thought!   

The difference is graphics smoothing. Node values ticked will give smooth contours, off is the exact facet/cell value. As the mesh is refined the values will match. 

[Pluto922]

I got it! Thanks a million!