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Ajayi Olukayode June 17, 2005 08:20

Meshing of a stirred tank reactor
 
I am having difficulties in meshing a stirred tank reactor with a pitched blade turbine at 45 degrees.

The tank's dimension: diameter = 300mm, height = 300mm, baffles width of 3mm.

Impeller diameter is 100mm and the impeller clearance is 100mm from the bottom.

I intend making use of multiple frame of reference(MFR) for the modelling approach.

I will appreciate every useful advice to have this done.

vidhya April 20, 2011 07:40

hi,
i am facing the same difficulty of meshing stirred tank reactor.. by this time you would have made it.. so help me if urs is solved.. i am not able to get a proper hexa mesh for the tank near the impeller domains.. the vertices are not projected to the tank surface.. instead its hanging and is messed up.. please help me out..

shadyenany September 15, 2011 16:59

Quote:

Originally Posted by Ajayi Olukayode
;121605
I am having difficulties in meshing a stirred tank reactor with a pitched blade turbine at 45 degrees.

The tank's dimension: diameter = 300mm, height = 300mm, baffles width of 3mm.

Impeller diameter is 100mm and the impeller clearance is 100mm from the bottom.

I intend making use of multiple frame of reference(MFR) for the modelling approach.

I will appreciate every useful advice to have this done.

Am doing nearly the same project, please pass any tutorial u've got
thanks

vidhya September 21, 2011 09:40

hey i had spent months meshing a pitchblade... finally i had to do tetra mesh for pitch blade as i dint find any tut for this...
but for a pitch blade try to use options align to vertex and edges... its a long time i did this.. sorry i dont exactly remember the tools i used.. if i get any link i will post it asap.

shadyenany September 22, 2011 17:01

1 Attachment(s)
Quote:

Originally Posted by vidhya (Post 325072)
hey i had spent months meshing a pitchblade... finally i had to do tetra mesh for pitch blade as i dint find any tut for this...
but for a pitch blade try to use options align to vertex and edges... its a long time i did this.. sorry i dont exactly remember the tools i used.. if i get any link i will post it asap.


I hope this clarify what I need exactly.. What type of mesh do you think I should use for the walls, membranes and the Impeller?


Another problem is that I don't know what shall I define the impeller as (boundary condition) in Gambit? as well as in Fluent?

notice that the impeller is working (rotates) only during the mixing process where is no air is provided by the membranes inside, so the question is shall I define the membranes in this stage as walls or porous zones?!

waiting for reply and feel free for any inquires.. thanks

green iran November 17, 2011 10:06

I just recently modeled a stirred tank with PB turbine. of course i had a lot of problems and i wasn't able to model impeller with struc mesh. finally i decided to mesh it with un struct tetrahedral.
if your model has no baffle so you can model only one quarter of the model. it helps you to reduce computational effort in running.
anyway, i think you gotta use un struc mesh.
good luck

aremu May 11, 2012 09:21

2 Attachment(s)
You can look this up if you are interested contact (aremunabeel@gmail.com) me for STR design including meshing in MRF

laolartet June 17, 2012 01:12

3 Attachment(s)
Hi, I am also working in STR, and I have the following issue: I did the domain in Solid Edge (the impeller, tank, etc) then in ANSYS workbench in the Design Modeler I created the “fluid” with the Fill and slice tools, and this solid (the fluid) is loaded in ICEM, I have read that is necessary to create two fluid zones in order to use MRF but I really don’t know how to do it, I have the following doubts:


How can I create fluid zones and the interior walls for the MRF?
The mesh is in the fluid or in the STR? If is in the Fluid, how can I select the reactor’s pieces separately?


How can I do a finer mesh in the bottom of the tank and less fine at the top? I’ve already tried with the “body of influence” tool but without good results.


I would really appreciate any help

aremu October 3, 2012 02:24

Send your request to aremunabeel@gmail.com


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