Pattern Evolution during Double Liquid-Vapor Phase Transitions under Weightlessness

Pattern Evolution during Double Liquid-Vapor Phase Transitions under Weightlessness.

Phase transition in fluids is ubiquitous in nature and has important applications in areas such as the food industry for volatile oils' extraction or in nuclear plants for heat transfer. Fundamentals are hampered by gravity effects on Earth. We used direct imaging to record snapshots of phase separation that takes place in sulfur hexafluoride, SF₆, under weightlessness conditions on the Interna...

Liquid Vapor Phase Transitions for Systems with Finite-Range Interactions

An outstanding problem in equilibrium statistical mechanics is to derive rigorously the existence of a liquid vapor phase transition in a continuum particle system. While such transitions are observed in all types of macroscopic systems there is at present no proof from first principles of their existence in particles interacting with any kind of reasonable potential, say Lennard Jones or hard ...

Liquid Vapor Phase Transitions: Modeling, Riemann Solvers and Computation

The numerical approximation of liquid vapor flows within the compressible regime is a challenging task because complex physical effects at the phase interfaces govern the global flow behavior. We develop a sharp interface approach which treats the phase boundary like a shock wave discontinuity and takes capillarity effects into account. The approach relies on the solution of Riemann problems ac...

Non-aqueous phase liquid spreading during soil vapor extraction.

Many non-aqueous phase liquids (NAPLs) are expected to spread at the air-water interface, particularly under non-equilibrium conditions. In the vadose zone, this spreading should increase the surface area for mass transfer and the efficiency of volatile NAPL recovery by soil vapor extraction (SVE). Observations of spreading on water wet surfaces led to a conceptual model of oil spreading vertic...

Phase transitions in liquid crystals