|
[Sponsors] |
October 5, 2010, 22:18 |
Modeling CSTR
|
#1 |
New Member
Vitor de Miranda Henrique
Join Date: Sep 2010
Posts: 6
Rep Power: 16 |
Hello,
I trying to model a CSTR in ANSYS (CFX or FLUENT) but i'm having doubt to build the geometry of the problem. Someone has a tutorial of this kind of problem? I do not know how to insert the initial conditions for the impeller or if you need to separate it somehow from the rest of the geometry. Thank you for your consideration, Vitor Henrique |
|
October 7, 2010, 22:23 |
|
#2 |
New Member
Pete
Join Date: Sep 2010
Posts: 2
Rep Power: 0 |
There is a tutorial in CFX for the multiphase modelling which involves a CSTR model.
Basically you need to make 2 geometries, one for the main tank with baffles and one for the impeller region with a surrounding mesh. Then put them together. You can add in hubshafts and the like once you understand what's going on. But I highly recommend doing the tutorial in CFX first. |
|
October 8, 2010, 10:03 |
|
#3 |
New Member
Vitor de Miranda Henrique
Join Date: Sep 2010
Posts: 6
Rep Power: 16 |
Hello,
I've had a look at this tutorial, but i have doubt in the geometry creation, and the mesh generation for the impeller, and for this tutorial, the geometry was already established. Do you know any tutorial with geometri creation, for moving parts? Tanks, Vitor Henrique |
|
September 25, 2012, 11:36 |
geometry creation of impeller for CFX
|
#4 | |
New Member
Palex Mapi
Join Date: Sep 2012
Posts: 5
Rep Power: 14 |
Quote:
There is anywhere explained how to make the correct geometry of an impeller with its rotating domain. PAMPS |
||
September 25, 2012, 20:21 |
|
#5 |
New Member
Pete
Join Date: Sep 2010
Posts: 2
Rep Power: 0 |
Sorry Vitor for not replying I did not realise you had followed up all that time ago. Since you are probably well passed this question I'll reply to you PAMPS.
The creation of the geometry is easiest in a 3D modelling program which you will have to learn to use. If you do the tutorials for whichever 3D modelling program you should be able to learn how to make an impeller quite easily. You don't need to do a tute specifically related to an impeller as you'll get the basic tools you need and go from there. Also, it is not something that is easy to explain in words, you'll need to just practise it. My basic process involves making the impeller geometry, then making a cylindrical domain. Then I boolean subtract the impeller geometry from the cylinder to leave the cfd volume. The same as pretty much all cfd volumes. Good luck. Pallen |
|
September 26, 2012, 12:34 |
Importing/Creating Impeller Geometry in DM
|
#6 |
New Member
Palex Mapi
Join Date: Sep 2012
Posts: 5
Rep Power: 14 |
Hi Pallen,
Thank you for the answer. I am studying ANSYS DM. I am struggling with the first steps of drawing the impeller surface which cannot be done by the standard process of 2D sketch to 3D surface. 1. As I have the impeller sections in ACAD, and in script files (sections and periphery line). I do not have a surface. Is the best aproach to use text files to import all the points I have as "construction points" into ANSYS DM and then loft a surface through them? or is there another possibility? 2. After having the impeller geometry I have to create the rotating (the cylinder) domain with the same pitch and shape at periodic domain interfaces (as do not want to model the 360º but only one blade (120º). Is that possible to create the periodic interfaces with standard Design Modeler or do I have to use DM withTurboEditor? 3. I have studied several tutorials and some of them have a "stagefluidzone" behind the impeller. Do I need this feature?, since at the end of the day I need to have a good estimate of the POWER and TORQUE delivered/absorbed by the ensemble impeller/shaft. Thank you for some guidance. |
|
November 11, 2012, 18:20 |
Modeling an impeller + shaft geometry
|
#7 |
New Member
Palex Mapi
Join Date: Sep 2012
Posts: 5
Rep Power: 14 |
Hi All,
Since my last questions I managed to model the impeller using construction points, splines and the loft function. Now the following steps are not working: 1. The impeller is a surface body while the shaft is a solid body. When I try boolean operations, in order to match perfectly the impeller with the hub (by subtracting excess of material which is inside the hub), it doesn't work. What should I do? 2. When I try to mesh the geometry in ANSYS meshing tool, it doesn't mesh the impeller. Even when I manage to mesh de impeller blade using ICEM CFD, then CFX Pre doesn't recognize it and doesn't import it. What should I do? Other questions that I still do not have a clue: 3. After having the impeller geometry I have to create the rotating (the cylinder created by function "Enclosure") domain with the same pitch and shape at periodic domain interfaces (as do not want to model the 360º but only one blade (120º). Is that possible to create the periodic interfaces with standard Design Modeler or do I have to use DM withTurboEditor? 4. I have studied several tutorials and some of them have a "stagefluidzone" behind the impeller. Do I need this feature?, since at the end of the day I need to have a good estimate of the POWER and TORQUE delivered/absorbed by the ensemble impeller/shaft. Thank you for some guidance even if only in one of these questions. |
|
July 8, 2016, 07:35 |
|
#8 |
New Member
neha
Join Date: Jul 2016
Posts: 1
Rep Power: 0 |
did you get how to model cstr??
|
|
Tags |
cfx, cstr, doubt, fluent, impeller |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Modeling well-mixed reactors (CSTR) with Fluent | Pirooz Darabi | FLUENT | 1 | October 31, 2007 21:19 |
May Focus Area: Turbulence Modeling | Jonas Larsson | CFD-Wiki | 0 | May 2, 2006 12:48 |
Modeling Flow/Saturation/Absorption in Fibers | Gene Dougherty | Main CFD Forum | 0 | June 6, 2003 15:49 |
CFD Modeling of Two-phase Flow in Small Dia.Tubes | Eric Poindexter | Main CFD Forum | 2 | September 22, 2000 10:21 |
Extrusion Modeling | Elliot Schwartz | Main CFD Forum | 1 | September 11, 1998 20:08 |