Types of Wind Tunnels
Aerodynamicists use wind tunnels to test models of proposed aircraft. In the tunnel, the engineer can carefully control the flow conditions which affect forces on the aircraft. By making careful measurements of the forces on the…
Low speed wind tunnel
Aerodynamicists use wind tunnels to test models of proposed aircraft. In the tunnel, the engineer can carefully control the flow conditions which affect the forces on the aircraft. By making careful measurements of the forces on…
Underwater Optical Wireless Communication Systems: A Concise Review
Abstract Underwater optical wireless communications (UOWC) have gained a considerable interest during the last years as an alternative means for broadband inexpensive submarine communications. UOWC present numerous similarities compared to…
RANS Modelling of Turbulence in Combustors
Abstract Turbulence modelling is a major issue, affecting the precision of current numerical simulations, particularly for reacting flows. The RANS (Reynolds‐averaged Navier‐Stokes) modelling of turbulence is necessary in the development…
On Turbulence and its Effects on Aerodynamics of Flow through Turbine Stages
Abstract In reality, the flows encountered in turbines are highly three‐dimensional, viscous, turbulent, and often transonic. These complex flows will not yield to understanding or prediction of their behavior without…
Interface Instability and Turbulent Mixing
Abstract Richtmyer‐Meshkov instability and turbulent mixing are fundamental problems of multi‐materials interface dynamics, which mainly focuses on the growth of perturbation on the interface and mixing of different materials. It…
Numerical method
Simulations in the present study were all run using the commercial CFD code Ansys FLUENT. The DHRL methodology was implemented using the User-Defined Function subroutines available with that solver. Other…
Model formulation
The DHRL model formulation is summarized in this section. Readers are referred to Bhushan and Walters for a more detailed description. Other models, including DES, DDES, and SST k-ω, are…
Critical Assessment of Hybrid RANS-LES Modeling for Attached and Separated Flows
Introduction Turbulent shear flows, including attached boundary layers and separated shear layers, are important application test cases for computational fluid dynamics prediction since they are observed for a wide array…
Buoyancy
WHAT MAKES A HOT-AIR BALLOON OR A BLIMP FLOAT? Hot-air balloons and blimps can float in the air thanks to buoyancy, an upward force that the air exerts on them.…
