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#1 |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
Dear all..
hi my name is Destry im a student of ITB (Bandung Institute of Technology) Indonesia major in ocean engineering I'm working on my thesis now about fluid flow around the pipe.. I have done a laboratory test. and now need a numerical simulation using FLUENT I examine the flow of water around the pipe that partly buried. There are two cases: single pipe and three parallel pipes .. I am just learning this software .. Please help me how to simulate these with FLUENT to produce velocity and pressure around the pipe .. thanks a lot Regards Destry |
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#2 |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
Rep Power: 17 ![]() |
What specifically do you need help with?
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#3 |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
i have make the meshing with gambit,, (but dont know it is a good meshing)
but really dont know how to run them in FLUENT,,, so,, i need steps how to run them n produce the velocity and pressure around the pipe |
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#4 |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
Rep Power: 17 ![]() |
Have you gone through some of the fluent tutorials? That's really the best way to get started and learn how to use the software. Also, the user's guide is actually pretty good at guiding you towards which solver to use, turbulence model, etc. Do you have some specific questions about the software?
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#5 | |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
Quote:
actually i have... but the tutorials use a different model with mine,, i have try using the guidance but produce a bad result... btw,,, when running this software will we get a set data of pressure and velocity in each grid? i havent found them yet when i finish run my cases |
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#6 |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
Rep Power: 17 ![]() |
Yes, you should be able to view the velocity and pressure data for your case. You can display them by going to Display-->Contours. Maybe you could post some plots of your solution and grid? Also, what solver are you using, what are your boundary conditions, etc?
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#7 |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
here i attach the grid and some of the fluent result..
i use steps in fluent tutorials to produce them http://flowlab.fluent.com/exercise/pdfs/cylinder.pdf so,, the data (pressure and velocity at each grid) will auto saved? how to open them? do they available in notepad format? |
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#8 |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
Rep Power: 17 ![]() |
The data can be saved at whatever interval you choose by going to File-->Write-->Autosave. You can post-process with fluent, or you could use something else, but I'm not really sure why you want to open the data file with a text editor, as the data is not in a reader-friendly format.
Regarding your simulation, what are your boundary conditions? Also, you might think about moving your inflow boundary farther upstream and refining the mesh in the near-wall regions. |
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#9 |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
in gambit you mean?
the boundary condition: velocity inlet outflow and wall for pipe and upper n bottom area.. i need the data (velocity and pressure) to calculate scouring with empirical formulas so i cant get them? |
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#10 | |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
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Quote:
Regarding the actual simulation, you might try using a structured grid to more adequately and efficiently resolve the near-wall region. Something like this: cylinder-01.jpgcylinder-02.jpg |
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#11 | |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
Quote:
i need the average data in front of the pipe after fluid crossing the pipe... may i get the mesh? if it is possible,,may u sent them to my email (sgn_mathiew@yahoo.com) as reference for me making grid in 2nd task (the parallel case) the scouring is such effect of fluid flow around pipe... actually bottom area is not a wall... but soil,, how i define them in gambit? |
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#12 |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
btw,,,,
thx for helping me today.... ![]() Regards Destry |
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#13 |
Senior Member
Chris
Join Date: Jul 2009
Location: Ohio, USA
Posts: 169
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I hope that the images I attached can be enough of a reference, as I don't feel comfortable sending you the actual grid.
Regarding the wall boundary condition: I you can't set a "soil" boundary condition, but you can set a value for the wall surface roughness to simulate the soil. That might be enough to get you what you need. Although, I might not understand exactly what you're asking. |
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#14 |
New Member
Destry Marulitua Siagian
Join Date: Jul 2010
Posts: 20
Rep Power: 16 ![]() |
ok...
thx for helping.... Regards Destry |
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