Conjugate Heat Transfer

Aim:

To Observe the heat transfer taking place between fluid and wall of the body.

Setup:

A cylinder with radius of 0.02 m, length 0.2 m and thickness 0.005m is created using the shape tool in converge studio.

The diagnosis is done and made the geometry error free.

Case Setup:

• General flow simulation with both gas and solid mixtures are taken.
• Fully hydrodynamic simulation with transient solver is used.
• Simulation time parameter is taken from 0 to 0.5 seconds.
• The boundary condition are:

1. Inlet - Fluid Region
2. Outlet - Fluid Region
3. Outer Wall - Solid Region
4. Thickness - Solid Region and
5. Interface

• The solid region species is taken as Aluminium.
• RNG k-Epsilon Turbulence Model is used.
• Super cycling model is used.

Procedure:

The simulation is done with 3 basic grids starting from 0.003m to 0.005 m. In all the simulations the heat transfer takes place properly and reaches a constant temperature after certain time. The basic grid of 0.004 m is run with three different supercycle stage interval.

Observation:

3e-3:

5e-3:

4e-3 (with supercycle stage interval 0.01):

4e-3 (with supercycle stage interval 0.02):

4e-3(with supercycle interval 0.03):

Super-cycle stage interval 0.03 - Simulation time 371.4762seconds

Super-cycle stage interval 0.02 - Simulation time 354.1752 seconds

Super-cycle stage interval 0.01 - Simulation time 309.0923 seconds

Result:

As the supercycle stage interval reduces the simulation time also gets decreased. The temperature converges to a particular value.