Fluids

Definition

Fluids are amorphous substances, mostly liquids or gases, that flow under an applied shear stress and have the tendency to assume the shape of their container.

Latest Research and Reviews

  • Research | | open

    Active chiral fluids are a special case of active matter in which energy is introduced into rotational motion via local application of torque. Here Banerjee et al. develop a hydrodynamic theory of such active fluids and connect it with odd viscosity which was previously considered an abstract concept.

    • Debarghya Banerjee
    • , Anton Souslov
    • , Alexander G. Abanov
    •  & Vincenzo Vitelli
  • Research |

    A liquid droplet is shown to slide across a solid surface subject to friction forces analogous with those between two solids. The phenomenon is generic, and closes a gap in our understanding of liquid–solid friction.

    • Nan Gao
    • , Florian Geyer
    • , Dominik W. Pilat
    • , Sanghyuk Wooh
    • , Doris Vollmer
    • , Hans-Jürgen Butt
    •  & Rüdiger Berger
  • Research | | open

    Emulsions—stabilized mixtures of immiscible liquids—are found in many products, ranging from pharmaceuticals to food. Here Guha et al. propose a simple emulsification method where water vapor is condensed onto oil with surfactant, producing a water-in-oil emulsion with droplets as small as 100 nm.

    • Ingrid F. Guha
    • , Sushant Anand
    •  & Kripa K. Varanasi
  • Research | | open

    Active nematics consist of self-driven components that develop orientational order and turbulent flow. Here Guillamat et al. investigate an active nematic constrained in a quasi-2D geometrical setup and show that there exists an intrinsic length scale that determines the geometry in all forcing regimes.

    • P. Guillamat
    • , J. Ignés-Mullol
    •  & F. Sagués

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