7 papers · 1 filter
Air entrainment by turbulent plunging jets: effect of jet roughness revisited
Ivan Redor, Gregory Guyot, Martin Obligado +2
The amount of air entrained by vertical water jets impacting a large pool is revisited. To test available phenomenological models, new data on the jet deformation at impact and on…
A new, optimized Doppler optical probe for phase detection, bubble velocity and size measurements: investigation of a bubble column operated in the heterogeneous regime
Anthony Lefebvre, Yann Mezui, Martin Obligado +2
A new measuring technique dedicated to bubble velocity and size measurements in complex bubbly flows such as those occurring in bubble columns is proposed. This sensor combines the…
The effect of and Rouse numbers on the settling of inertial particles in homogeneous isotropic turbulence
Daniel Odens Mora, Martin Obligado, Alberto Aliseda +1
We present an experimental study on the settling velocity of dense sub-Kolmogorov particles in active-grid-generated turbulence in a wind tunnel. Using phase Doppler interferometry…
Clustering of vector nulls in homogeneous isotropic turbulence
D. O. Mora, M. Bourgoin, P. D. Mininni +1
We analyze the vector nulls of velocity, Lagrangian acceleration, and vorticity, coming from direct numerical simulations of forced homogeneous isotropic turbulence at $Re_λ\in [40…
Estimating the integral length scale on turbulent flows from the zero crossings of the longitudinal velocity fluctuation
Daniel Odens Mora, Martin Obligado
The integral length scale () is considered to be characteristic of the largest motions of a turbulent flow, and as such, it is an input parameter in modern and classic…
Study on preferential concentration of inertial particles in homogeneous isotropic turbulence via Big-Data techniques
M. Obligado, A. Aliseda, T. Calmant +2
We present an experimental study of the preferential concentration of sub-Kolmogorov inertial particles in active-grid-generated homogeneous and isotropic turbulence, characterized…