# Finite Volume Method For Cylindrical Coordinates

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 May 18, 2011, 01:07 #41 New Member   Udhab Adhikari Join Date: May 2011 Posts: 2 Rep Power: 0 I have been assigned the task of discretization of navier stokes equation in cylindrical coordinates in 2-D and writing code for it.please tell me which book or article should I follow to learn the finite volume method easily.

 May 24, 2011, 23:10 #42 New Member   Oky Andytya Join Date: Nov 2010 Posts: 26 Rep Power: 9 Hi everyone, I need help, how to get the value of convection coefficient [h] from Fluent directly? Thank you. Regrads, Oky

 September 18, 2011, 15:15 simple algoritm #43 New Member   mina Join Date: Jul 2011 Posts: 2 Rep Power: 0 hi i need c++ code simple algoritm, a cylinder with ro radial and adiabatic. a rod with ri radial insert in sylinder and heat flux is constant,Q"=cost, entree temture and velocity are Tin,Vin , Re=500, outer flow development. i can not conversion cartezian coordenate to cylinderical coordenate and i do not undrestand boundry condition, i want calculate veocity profile , friction coefficient on outer surface rod and NU number, i should write program with c++; please help me thank you very much. Last edited by mina; September 18, 2011 at 15:23. Reason: mistake

 March 22, 2012, 08:55 #44 Member   Ren/Xingyue Join Date: Jan 2010 Location: Nagoya , Japan Posts: 44 Rep Power: 9 Hi! I wrote a 3d code in cylindrical coordinates with FVM. In staggered gird system, the control cell at the the axis is a triangular cell so that the singularity can be removed. The only problem is how to calculate the velocity at the axis. Last edited by hilllike; March 23, 2012 at 03:35.

January 15, 2014, 03:17
i have same problem
#45
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danial
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Quote:
 Originally Posted by falopsy I am developing a CFD code for a stirred tank but have quite a few issues I will appreciate if anyone can help me with: 1. There are very few books on the discretisation of the Navier-Stokes equation in cylindrical coordinates. I am having problem knowing which terms to put at the surface and which to put at the centre due to the appearance of terms like 1/r^2. 2. Also, I have issues with staggered grid and I dont really understand the collocated grid methods either. My problem with staggered grid has to do with how to store the velocity vectors as matrices as most program dont accept frational index i.e. vij+1/2 used in staggered grid. 3. Most books have the discretised equation for rectangular coordinate but none for cylindrical coordinates. Is there any good book that explained the discetisation of the Navier-Stokes equation in cylindrical coordinates? 4. I am also thinking maybe I should work in rectangular coordinates but with a cylindrical coordinate fitted grids and then approximate the length of the mesh as rectangular i.e dx=dr, dy = rdTheta, dz= dz. My only concern here is that I need to now convert the source term vectors from rectangular to cylindrical and also my boundary conditions. Does anyone understand what I'm trying to say or does it not make any sense. Any help will be greatly appreciated. Thanks
i have the same problem like you,i don't know how can discretize Navier stocks equation in cylindrical coordinates.(how integrete them in C.V) i konw it's old post but i really need it

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