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A method is developed to describe the linear internal wavefield generated by an oscillating source in horizontally moving, depth-dependent background. Ray theory is used to approximate the vertical eigenfunctions. A spatial solution is then obtained by inverse Fourier transform. This is a...
A combined experimental and numerical analysis has been carried out to study Marangoni effects during the evaporation of droplets. The experiments are performed with pendant drops of silicone oils (with different viscosities) and hydrocarbons. The temperature of the disk sustaining the drop is...
This paper reports an experimental investigation of isolated fluid particles rising (or falling) in a quiescent viscous liquid placed in an oscillating frame. Our goal is to carry out the first quantitative analysis of the effect of the history force on clean and spherical drops and bubbles. The...
An experimental investigation of free stream turbulence (FST) induced disturbances in asymptotic suction boundary layers (ASBL) has been performed. In the present study four different suction rates are used and the highest is 0.40% of the free stream velocity, together with three different FST...
The velocity filtered joint density function (VFJDF) used in large eddy simulation and the structure of the subgrid-scale (SGS) velocity are studied experimentally. Measurements are made in the fully developed region of an axisymmetric turbulent jet (with jet Reynolds number U j D j / ν = 40 000...
An experimental and theoretical investigation aimed at describing the nonmodal growth of steady and spanwise periodic streamwise streaks in a flat plate boundary layer is presented. Stable laminar streaks are experimentally generated by means of a spanwise periodic array of small cylindrical...
The onset of convection in a two-dimensional porous cavity is investigated where the cavity is subject to asymmetric boundary conditions at the lateral walls: one vertical wall is thermally conducting and impermeable, while the other is thermally insulating and open. At the open boundary the...
Parabolized stability equations F. P. Bertolotti, Th. Herbert, and P. R. Spalart, J. Fluid. Mech. 242 , 441 (1992) have been used to study the stability of a family of swirling jets at high Reynolds numbers whose velocity and pressure fields decay far from the axis as r m −2 r m − 2 and r 2(...
In this work we investigate the dynamics of self-sustained detonation waves that have an embedded information boundary such that the dynamics is influenced only by a finite region adjacent to the lead shock. We introduce the boundary of such a domain, which is shown to be the separatrix of the...
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