43 citations · 141 across the 7 of their papers we have counts for
7 papers · 1 filter
From directed percolation to patterned turbulence
Roger Ayats, Lukasz Klotz, Björn Hof
The transition to turbulence is characterized by an abrupt loss of order and predictability, featuring the intermittent proliferation and decay of localized turbulent structures. E…
The phase transition to turbulence in spatially extended shear flows
Lukasz Klotz, Gregoire Lemoult, Kerstin Avila +1
Directed percolation(DP) has recently emerged as a possible solution to the century old puzzle surrounding the transition to turbulence. Multiple model studies reported DP exponent…
Decay of streaks and rolls in plane Couette-Poiseuille flow
Tao Liu, Benoît Semin, Lukasz Klotz +3
We report the results of an experimental investigation into the decay of turbulence in plane Couette-Poiseuille flow using 'quench' experiments where the flow laminarises after a s…
Experiments on a jet in a crossflow in the low-velocity-ratio regime
Lukasz Klotz, Konrad Gumowski, Jose Eduardo Wesfreid
The hairpin instability of a jet in a crossflow (JICF) for a low jet-to-crossflow velocity ratio is investigated experimentally for a velocity ratio range of and…
Experiments on transient growth of turbulent spots
L. Klotz, J. E. Wesfreid
We present detailed experiments on transient growth of turbulent spots induced by external forcing in plane Couette-Poiseuille flow, which are studied in the framework of linear of…
Experimental investigation of flow behind a cube for moderate Reynolds numbers
L. Klotz, S. Goujon-Durand, J. Rokicki +1
The wake behind a cube with a face normal to the flow was investigated experimentally in a water tunnel using laser induced fluorescence visualisation (LIF) and particle image velo…
Couette-Poiseuille flow experiment with zero mean advection velocity: Subcritical transition to turbulence
Lukasz Klotz, Grégoire Lemoult, Idalia Frontczak +2
We present a new experimental set-up that creates a shear flow with zero mean advection velocity achieved by counterbalancing the nonzero streamwise pressure gradient by moving bou…