|March 25, 2005, 12:40||
Natural Convection over a vertical wall
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
|March 27, 2005, 03:43||
Re: Natural Convection over a vertical wall
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||
Join Date: Jul 2012
Posts: 5Rep 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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