Julien Pennecot

Simulation of the Flow in a Human Nose

The human nose is a very complex organ. The main airways together with a multiplicity of nasal cavities and sinuses are involved in the various functions of the nose. It warms and humidifies the inspired air, filters out small particles and supports the olfaction process by transporting odor-bearing particles to the muscous membranes. The flow simulations presented in this paper are based on the geometry of a real human nose. Based on a series of CT images, a body-fitted, hybrid numerical grid was built up. The DLR THETA code is used to simulate the unsteady flow inside the nose. The transport of a marker gas is simulated to visualise the entrainment of air from the sinuses to the inspired air.

Unsteady Numerical Simulation of the Turbulent Flow around a Wind Turbine

A study of the turbulent air flow around a wind turbine based on unsteady Reynolds-averared Navier-Stokes (URANS) simulation in order to determine the induced loads on its blades for off-design flow cases is performed. In particular the impact of applied turbulence models on the flow simulation results will be discussed.

Numerical and experimental investigations of turbulent convection with separation in aircraft cabins

Turbulent mixed convection in two generic configurations, the geometry of which was deduced from a passenger cabin and a sleeping bunk of a modem long distance passenger aircraft, has been investigated numerically by means of Reynolds averaged Navier-Stokes (RANS) computations. In the same configurations Particle Image Velocimetry (PIV) measurements were conducted to validate the numerical results. The performed comparison indicates that results obtained using RANS with low Reynolds number turbulence models agree considerably better with experimental data than those of RANS with high Reynolds number turbulence models.