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Solidification axi-symmetric unsteady

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Old   June 26, 2016, 17:30
Default Solidification axi-symmetric unsteady
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Abdullatif A. Gari
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My problem is a hollow cylinder modeled as a 2d (r,z) axi-sym problem.
Inner BC has variable temperature which I have modeled using UDF ans is as follows: T = 312.+10.*sin(2.*PI*t/86400)*(0.5-x[0]);
Outer BC is convection with Tinf=300 and h=5
dimensions: Di = 0.1 cm, Do = 0.3 cm, L = 1 m
Solver is pressure based, axi-sym, unsteady, 1st order implicit
Model is energy and solidification are on
gravity = -9.81 in (-ve) x-direction
fluid is heneicosane well defined and used before with solidification with no problem.
solution control all default but used presto, 2nd order for descritization
I used 1 sec and 0.01 sec as time steps.

when writing temperatures of inner and outer surface monitor it gives very low and high temp's like 222 K bot and 565 K top
Also animation for solidification is not showing any thing
animation for temperature is showing that the melting temp is reached and passed. (initial temperature is 300)

Any help? how to have animation of liquid fraction and right temp distribution in the systsem?

Version used: FLUENT
Version: 2d, dp, pbns, lam, unsteady (2d, double precision, pressure-based, laminar, unsteady)
Release: 6.3.26
Cortex Version: 3.7.3

Model Settings
Space 2D
Time Unsteady, 2nd-Order Implicit
Viscous Laminar
Heat Transfer Enabled
Solidification and Melting Enabled

Equation Solved
Flow yes
Energy yes

Pressure PRESTO!
Momentum Second Order Upwind
Energy Second Order Upwind
agari is offline   Reply With Quote


presto, solidification/melting, unsteady

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