Natural Convection over a vertical wall

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 March 25, 2005, 12:40 Natural Convection over a vertical wall #1 Sireesha Pasari Guest   Posts: n/a hello all, I am relatively new to using fluent, Kindly forgive me if i am wrong anywhere. I am trying to perform natural convection over a vertical thin wall (wall thickness = 0), and calculate heat flux along the wall surface, temperature variation and velociy distribution. modelled as a box : left, top, right, bottom this is how my boundary conditions are: (units same as in fluent) wall definied to the left wall properties: heat transfer coeffecient: 6.8085 calculated from nussles number and thermal conducivity and wall length, Free sream temperature:290K wall temperature = 310K inlet at the bottom (pressure inlet): inlet temperaure = 290K outlet at the top (pressure outlet) : backflow emperature 290K symmetry defined to the right wall lenghth: 0.04 m operating conditions : gravity = -9.81 maerial properties (air) density (bossique eq): 1.177 Cp = 1005 thermal conductivity (K) = 0.0267 viscosity = 1.845E-5 prandtl number = 0.69 -> calculated from alpha = 0.2216e-6 m^2/s, and viscosity = 16.84E-6 at 300K I am aable to obain the curves for temperature and velocity, and theoritically they appear to be correct, but i am not able to obtain the heat flux (fluent gives me 0) i did not make any changes to reference values under report in fluent. PLease help me, as I feel I am lost in this. Thank you all in Advance Sireesha Pasari

 March 27, 2005, 03:43 Re: Natural Convection over a vertical wall #2 dpshaka Guest   Posts: n/a you have not give a boundary condition on the wall . my object is "numerical simulation of the natural convection of cylinder arrays in large and finite space ". my prilimary simulation is the numerical simulation of the natural convection over a vertical flat withe isoflux and isomal boundary condition. fluent give me excellent resulte when compared withe the benchmark solution. i think the problem is your boundary condition of the wall. i can not understand why you have give the value of h first.

 July 15, 2012, 16:31 #3 New Member   Shaon Join Date: Jul 2012 Posts: 5 Rep Power: 6 I am a novice in the field of CFD. Anyway, my objective is " Numerical analysis of laminar natural convection over a vertical plate" . Can you help me in this respect?

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