Week 6: Conjugate Heat Transfer Simulation
Conjugate Heat Transfer Simulation
AIM: Solid-Fluid heat transfer simulation of a cylindrical pipe. Analysis of the influence of Super cycling in total simulation time compares against the baseline configuration.
The term conjugate heat transfer is used to describe processes that involve variations of temperature within solids and fluids due to thermal interaction between the solids and fluids. A typical example is the heating of the cooling of a solid object by the flow of air in which it is immersed.
Geometry
Case set up:
`Re = (rho*V*D)/mu`
Velocity of inlet = 3.5156 m/s
Grids:
case 1 = 0.004m (baseline mesh)
case 2 = 0.002 m
case 3 = 0.003 m
- Super cycling 0.01
- Super cycling 0.02
- Super cycling 0.03
Post processing and Results:
1. Surface with mesh 0.004m
Temperature distribution 0.04 m
2. Surface with mesh 0.002 m
Temperature distribution 0.002 m
Analysis:
Temperature convergence
From the above plot, for finer mesh, the outflow average temperature is fairly settled whereas for coarser mesh it is not. Even more, refinement does not give significant temperature variation (not below 300K) at outlet. Hence, it can be concluded that temperature dependency has been consistency at mesh size 0.002m.
Effect of super cycling:
As from the above combine plot, When Super cycling interval time length reached, CONVERGE freezes the fluid solver and calculates the time-averaged HTC and temperature for each cell at the solid/fluid interface based on the values before the interval begins, CONVERGE performs the
solid heat transfer calculation at this time using the time-averaged HTC and near-wall fluid cell temperatures as boundary conditions at the INTERFACE. (Source: Converge user manual)
Hence, As the value of Supercycling time length increased the duration of simulation too increased.