# how to start for modelling n meshing a mixing tank with impeller

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 April 9, 2011, 03:27 how to start for modelling n meshing a mixing tank with impeller #1 New Member   jeevan Join Date: Apr 2011 Posts: 5 Rep Power: 6 can anyone help me out how to start for creating a mixing tank model with impeller, i am new to cfd. thanks in advance.

 April 20, 2011, 07:47 #2 New Member   Join Date: Jan 2011 Posts: 24 Rep Power: 6 hi, i am also new to cfd.. still you can start by first designing the geometry in design modeller or importing a cad geometry.. u have to create two domains if u ought to design a tank with impeller. one is the stationary tank domain and the other is the rotating domain for impeller. no tutorials wil be available for these. so u can go through some of basic to know about all the tools available if u are using ansys design modeller.. by the way what cfd package are u using? i can help u out with the steps if its design modeller...

 April 21, 2011, 07:23 #3 New Member   jeevan Join Date: Apr 2011 Posts: 5 Rep Power: 6 thank u vidhya for your reply.. i will explain what i have done. i considered a rectangular tank with rectangular blade inside..i modeled and imported to icem cfd for meshing.. how do i start abt it for meshing. i want the blade to rotate simulating the mixing.. waiting for your reply..

 April 21, 2011, 07:46 #4 New Member   Join Date: Jan 2011 Posts: 24 Rep Power: 6 hi jeevan, the best way to start is to learn the tutorials of 3d pipe junction and pipe blade... if u want to simulate and see ur results then tetra meshing will be the easiest though its nt very accurate.. and meshing has nothing to do with the blade rotating.. you will define all that in the fluent or cfx whichever software u use.. meshing is mainly to discretise the whole geometry into small volumes so tat the equations are solved in all the control volumes.. actuallly the easiest way to start with hexa or tetra meshing is to do meshing separately for tank and impeller... cos tank is stationary domain.. and impeller is another (rotating).. so u first export ur geometry to icem cfd.. define parts individually like baffles, shaft, periodicity, interface and all that.. yu can refer mixing tank simulation tutorials so that u will get an idea about different parts to be defined.. u can delete the impler domain.. (blades, hub) similarly for impeller meshing, delete tank domain and mesh separately.. this is how we go about it... hope u can understand..

 April 22, 2011, 04:47 #5 New Member   jeevan Join Date: Apr 2011 Posts: 5 Rep Power: 6 hi vidhya, let me put wat i understood, first i will mesh the tank removing the blade by a block with o grid..then i will take another block and mesh the blade alone.. so i will have 2 bodies with 2 meshes...is that what u meant.

April 22, 2011, 08:00
#6
New Member

Join Date: Jan 2011
Posts: 24
Rep Power: 6
yeh,
by the way i dont know if u had created a domain around your blade or not...
for ur reference see this..
this is how ur pic should luk like... an eg..
now see in the pic..
the two domains..
blade should be inside a domain..
then as u understood carry on with meshing
good luck...
Attached Images
 2.jpg (102.4 KB, 124 views) 1.jpg (17.5 KB, 120 views)

April 23, 2011, 05:54
#7
New Member

jeevan
Join Date: Apr 2011
Posts: 5
Rep Power: 6
hi vidhya,
thanks for the reply...i saw those images...how do i create domains...i dont know the domain concept...i will upload the geometry pic...have a look..
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 April 30, 2011, 00:21 #9 New Member   jeevan Join Date: Apr 2011 Posts: 5 Rep Power: 6 thnk u vidhya, sorry that i couldn't reply...let me try and get back to you...

 July 16, 2013, 07:06 rotating reactor #10 New Member   yes Join Date: Jul 2013 Posts: 7 Rep Power: 4 I am using ansys 13.

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