50 citations · 193 across the 9 of their papers we have counts for
9 papers
Size-dependent transient nature of localized turbulence in transitional channel flow
Duo Xu, Baofang Song
It has been reported that a fully localized turbulent band in channel flow becomes sustained when the Reynolds number is above a threshold. Here we show evidences that turbulent ba…
Measurement error of tracer-based velocimetry in single-phase turbulent flows with inhomogeneous refractive indices
Huixin Li, Andreas Fischer, Marc Avila +1
Inhomogeneous refractive index fields lead to errors in optical flow velocity measurements. Former respective studies are mostly in quasi two-dimensional flows, and attribute the m…
Propagation speed of turbulent fronts in pipe flow at high Reynolds numbers
Kaiwen Chen, Duo Xu, Baofang Song
We investigated the propagation of turbulent fronts in pipe flow at high Reynolds numbers by direct numerical simulation. We used a technique combining a moving frame of reference…
A single-camera synthetic Schlieren method for the measurement of free liquid surfaces
Huixin Li, Marc Avila, Duo Xu
A single-camera synthetic Schlieren method is introduced to measure the height of a dynamic free liquid surface in a container with a flat bottom. Markers placed on the bottom, see…
Non-modal transient growth of disturbances in pulsatile and oscillatory pipe flow
Duo Xu, Baofang Song, Marc Avila
Laminar flows through pipes driven at steady, pulsatile or oscillatory rates undergo a sub-critical transition to turbulence. We carry out an extensive linear non-modal stability a…
Resonances in pulsatile channel flow with an elastic wall
Duo Xu, Matthias Heil, Thomas Seeböck +1
Interactions between fluids and elastic solids are ubiquitous in application ranging from aeronautical and civil engineering to physiological flows. Here we study the pulsatile flo…
Nonlinear hydrodynamic instability and turbulence in pulsatile flow
Duo Xu, Atul Varshney, Xingyu Ma +4
Pulsating flows through tubular geometries are laminar provided that velocities are moderate. This in particular is also believed to apply to cardiovascular flows where inertial fo…
The effect of pulsation frequency on transition in pulsatile pipe flow
Duo Xu, Marc Avila
Pulsatile flows are common in nature and in applications, but their stability and transition to turbulence are still poorly understood. Even in the simple case of pipe flow subject…
Transition to turbulence in pulsating pipe flow
Duo Xu, Sascha Warnecke, Baofang Song +2
Fluid flows in nature and applications are frequently subject to periodic velocity modulations. Surprisingly, even for the generic case of flow through a straight pipe, there is li…