Solidification axi-symmetric unsteady
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 Type SIMPLE Pressure PRESTO! Momentum Second Order Upwind Energy Second Order Upwind |
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