UFO: "Unidentified" Floating Object Driven by Thermocapillarity

Ultimate Turbulent Taylor-Couette Flow

Ultrafast High-pressure AC Electro-osmotic Pumps for Portable Biomedical Microfluidics

Ultrafast Interference Imaging of Air in Splashing Dynamics

Unbalanced instabilities of rapidly rotating stratified shear flows

Unconditional jetting

Underlying mechanism of numerical instability in large eddy simulation of turbulent flows

Understanding mixing efficiency in the oceans: Do the nonlinearities of the equation of state matter?

Understanding the sub-critical transition to turbulence in wall flows

Underwater bubble pinch-off: the decay of advection out of the singularity

Undulatory locomotion of {\it C. elegans} on wet surfaces

Undulatory swimming in viscoelastic fluids

Unified Model of Quasi-Periodic Oscillations

Uniform Conversions of Operating Points and Characteristics of Compressor

Unique representation of an inverse-kinetic theory for incompressible Newtonian fluids

Uniqueness in Relativistic Hydrodynamics

Universal constants and equations of turbulent motion

Universal dissipation scaling for non-equilibrium turbulence

Universal Distribution of Centers and Saddles in Two-Dimensional Turbulence

Universal dynamics in the onset of a Hagen-Poiseuille flow