important

majid.masoudi · May 23, 2017, 04:14

hi everybody
I want to simulate a rotating cone with 11000 hole in surface.
there is melt urea in this cone and Urea melt by centrifugal force turns to solid urea(prill).

I want to know what the output droplet size by varying the number of holes are changed.
This can be simulated with Fluent is?

best regards

mprinkey · May 23, 2017, 15:26

You will likely need to model just a single hole with a detailed two-phase model with solidification with a body-force or rotating reference frame to approximate the spinning of the cone. You will need to do a transient analysis and simulate several droplet ejections. Usually, you will need to throw away the first droplet or two because initial conditions will be ad hoc. Then, you will need to post-process and calculate statistical data on the rest of the droplets in the series.

Do not even think about modeling the entire cone. You need to resolve the ejected droplet with several cells across in each dimension. And you cannot do anything to make this steady-state, so you will be looking at pretty long single simulation run times. And each time you change hole count, you resize the holes and you will need to rerun the simulation. It is doable, but it will be a lot of work, both for the simulations and for post-processing the results. This is almost always the plight of multiphase CFD analyses.

Good luck.

May 23, 2017, 04:14	important	#1
majid.masoudi New Member majid Join Date: Apr 2017 Posts: 1 Rep Power: 0	hi everybody I want to simulate a rotating cone with 11000 hole in surface. there is melt urea in this cone and Urea melt by centrifugal force turns to solid urea(prill). I want to know what the output droplet size by varying the number of holes are changed. This can be simulated with Fluent is? best regards

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
important: spillway with aerator device	flow_CH	Main CFD Forum	1	March 1, 2013 09:17
Which hardwares for workstation are more important to do CFD analysis?	caitoc	Hardware	9	January 8, 2013 19:31
Important problems in CFD	Mixo123	Main CFD Forum	8	June 30, 2012 12:38
Hard disk speed important to increase CFD computing speed?	lawrencelaw	Hardware	13	November 17, 2009 14:35
An important Question	Davoche	Main CFD Forum	1	December 29, 2005 02:45

May 23, 2017, 15:26		#2
mprinkey Senior Member Michael Prinkey Join Date: Mar 2009 Location: Pittsburgh PA Posts: 363 Rep Power: 25	You will likely need to model just a single hole with a detailed two-phase model with solidification with a body-force or rotating reference frame to approximate the spinning of the cone. You will need to do a transient analysis and simulate several droplet ejections. Usually, you will need to throw away the first droplet or two because initial conditions will be ad hoc. Then, you will need to post-process and calculate statistical data on the rest of the droplets in the series. Do not even think about modeling the entire cone. You need to resolve the ejected droplet with several cells across in each dimension. And you cannot do anything to make this steady-state, so you will be looking at pretty long single simulation run times. And each time you change hole count, you resize the holes and you will need to rerun the simulation. It is doable, but it will be a lot of work, both for the simulations and for post-processing the results. This is almost always the plight of multiphase CFD analyses. Good luck.