rotation axis origin

November 20, 2007, 12:43

Hi,

i want to simulate a stirred tank.I've defined the stirrer as moving wall, rotational. Now i have to define the rotation axis origin. Which point excatly is meant by this? I can define a x-value and a y-value. Thanks for your help!

greets aequitas

November 20, 2007, 12:50

sorry, i´ve forgot to say that it´s a 2d simulation.

green iran · June 5, 2011, 05:28

i think u made some wrong.as far as i'm concerned for simulating a stirred tank in 2D, there are 2 methods:
1- using velocity date which means u don't need MRF any more longer, u just need to fix a zone for impeller with proper BC
2-MRF method which in this way u gotta divide your domain in 2 section one rotating and the other stationary.but u have to stick in your mind that u must rotate fluid adjacent to impeller instead of impeller. there's good tutorial regarding this in fluent. u can get it like having a piece of cake.
good luck

November 20, 2007, 12:43	rotation axis origin	#1
aequitas Guest Posts: n/a	Hi, i want to simulate a stirred tank.I've defined the stirrer as moving wall, rotational. Now i have to define the rotation axis origin. Which point excatly is meant by this? I can define a x-value and a y-value. Thanks for your help! greets aequitas

November 20, 2007, 12:50	Re: rotation axis origin	#2
aequitas Guest Posts: n/a	sorry, i´ve forgot to say that it´s a 2d simulation.

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June 5, 2011, 05:28		#3
green iran New Member A_A Join Date: Oct 2010 Posts: 10 Rep Power: 16	i think u made some wrong.as far as i'm concerned for simulating a stirred tank in 2D, there are 2 methods: 1- using velocity date which means u don't need MRF any more longer, u just need to fix a zone for impeller with proper BC 2-MRF method which in this way u gotta divide your domain in 2 section one rotating and the other stationary.but u have to stick in your mind that u must rotate fluid adjacent to impeller instead of impeller. there's good tutorial regarding this in fluent. u can get it like having a piece of cake. good luck