Impinging jets are widely used as cooling systems in applications such as gas turbines and metal quenching. The electronics industry employs jets of cold air impinging on high-power processors and chips for thermal management. An impinging cooling system comprises a jet of high-velocity fluid striking a hot target surface. The fluid jet picks up thermal energy from the hot surface, thus enhancing heat transfer from it. During this process, thermal energy is transported from the hot surface to the fluid via forced convection, raising the fluid temperature in the process. Several fluids such as air and water are used in such cooling applications. In this example, we will illustrate the cooling process by simulating impingement of an axisymmetric air jet on a hot cylindrical pedestal.
The main objective of this example is to understand the process of heat transfer from a heated cylindrical pedestal that is being cooled by an air jet and to get an insight into the flow physics of an impinging jet.
Download the Mesh file needed for setting up the simulation and the associated Case & Data files here. Follow the instructions below to set up this simulation in Ansys Fluent starting with the Mesh file. In case you face any issues setting up or running the simulation, refer to the corresponding initial and final Case and Data files.
Let us now analyze the simulations and understand the physics an impinging jet on a cylinder.