PROJECT
This project is carried out in corporation with Tetra Pak. The main objective of the project is to optimize the heat transfer and pressure drop in corrugated tubes and shells. Since the geometrical parameters of the tubes have an crucial role in the performance of the heat exchangers, the objective is to find an efficient geometrical form of the corrugations and to increase our understandning of the critical parameters for high heat transfer and low pressure drop. Both Large Eddy Simulation (LES) and Direct Numerical Simulations (DNS) are used for studying the fluid flow and heat transfer. Our predictions will initially be compared with experimental results carried out at Tetra Pak; in general, however, we believe that our our LES and DNS will be as accurate as experimental data.

In order to simplify the simulations, we will initially study the flow in a plane channel where the lower wall is corrugated, see the figure above. The advantage of a plane configuration (channel) to a circular one (pipe) is that the extent of the domain in the spanwise direction is smaller than the perimeter of the pipe. Hence a smaller mesh can be used.

The CALC code is used for both LES and DNS simulations.