We consider the spectral stability of certain traveling wave solutions for the Boussinesq ‘abc’ system. More precisely, we consider the explicit sech(x) like solutions of the form (φ(x − wt), ψ(x − wt) = (φ, const.φ), exhibited by M. Chen, [7], [8] and we provide a complete rigorous characterization of the spectral stability in all cases for which a = c < 0, b > 0.

The aim of this experimental study is two-dimensional investigation of cargo behavior after separation which is carried out in the subsonic wind tunnel. Given that the real separation occurs in three-dimension, the results of this study may be widely used in numerical aerodynamic studies for verification of new computational methods and they can be used as the reference results in this area. So...

The dynamic response and performance of a micro UAV is greatly influenced by its aerodynamics which in turn is affected by the interactions with features in the environment in close proximity. In the paper we address the modeling of quadrotor robots in different flight conditions that include relative wind velocity and proximity to the ground, the ceiling and other robots. We discuss the incorp...

titled Advanced simulation techniques for vortex dominated flows in aerodynamics. The financial support from STW and the National Aerospace Laboratory NLR is gratefully acknowledged.

Accidental release scenarios such as flammable gas leaks or ruptures of pipes and pressurised process-equipment normally originate high velocity jets which, if ignited, give rise to jet fires. Although the direct effects of jet fires are considered to be relatively smaller than that associated to other types of fires, they are characterized by high heat fluxes and, especially if there is flame ...

Numerical modeling of the behavior of fire and smoke within proposed building atria have revealed the possible presence of violent fire whirls or fire tornadoes induced by an inadvertent combination of ventilation and exhaust openings. Such fire vortexes can accelerate combustion up to ten times that seen during conventional fires, rapidly move fire and debris across available evacuation routes...

The simulation of wind turbine rotor aerodynamics can be improved upon by increasing the physics content in the underlying approximations. The current effort is targeted at an aerodynamics model in which the flow field is decomposed into two domains. The inviscid external flow domain is modeled with a “panel method” type of flow solver and the viscous regions are modeled with an integral bounda...