Internal Aerodynamics

In fluid mechanics, an internal flow is a flow for which the fluid is confined by a surface. Hence the boundary layer is unable to develop without eventually being constrained. The internal flow configuration represents a convenient geometry for heating and cooling fluids used in chemical processing, environmental control, and energy conversion technologies. Applications therefore include flows in pipes, ducts, air conducts, cavities, jet engines or wind tunnels.

 

The Poiseuille flow is a classic and simple problem in viscous, laminar flow involving the steady-state velocity for a fluid moving laterally between two plates whose length is much greater than the distance separating them (Read more).

The circular Couette flow consists of a viscous fluid confined in the gap between two rotating cylinders. The rotating cylinders brings the fluid in motion and the flow is considered stable for low angular velocities (Read more).

The backward facing step is a challenging numerical problem based on a simple geometry but retaining rich flow physics. It consists of a duct flow with the channel suddenly expanding and creating one or several recirculation zones on the upper and lower parts of the channels depending on the Reynolds number (Read more).

The driven cavity problem has long been used as a benchmarking test case for incompressible CFD solvers.The standard case is a fluid contained in a square domain with three stationary sides and one moving side (with velocity tangent to the side). Depending on the Reynolds number, different vortexes can appear at various locations (Read more).

The flow of Non-Newtonian fluids is also encountered in many branches of engineering (physical chemistry, blood mechanics, hair gel, corn syrup, oobleck). Those test cases focus on the validation of the Power Law model for Non-Newtonian fluids and the Carreau and Cross models respectfully (Read more) and (Read more).