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The structure and origin of confined Holmboe waves
(Cambridge University PressJournal of Fluid Mechanics, 2018-08-10)
Finite-amplitude manifestations of stratified shear flow instabilities and their spatio-temporal coherent structures are believed to play an important role in turbulent geophysical flows. Such shear flows commonly have ...
Experimental exploration of fluid-driven cracks in brittle hydrogels
(Cambridge University PressJournal of Fluid Mechanics, 2018-06-10)
Hydraulic fracturing is a procedure by which a fracture is initiated and propagates due to pressure (hydraulic loading) applied by a fluid introduced inside the fracture. In this study we focus on a crack driven by an ...
Detrainment of plumes from vertically distributed sources
(SpringerEnvironmental Fluid Mechanics, 2016-11-22)
We present experimental results demonstrating that, for the turbulent plume from a buoyancy source that is vertically distributed over the full area of a wall, detrainment qualitatively changes the shape of the ambient ...
Ten questions about natural ventilation of non-domestic buildings
(ElsevierBuilding and Environment, 2016-10)
Throughout history, natural ventilation has remained the preferred choice for the majority of residential buildings, while, in commercial buildings, natural ventilation went from being the single option to somewhat of a ...
Impact of aperture separation on wind-driven single-sided natural ventilation
(ElsevierBuilding and Environment, 2016-11-01)
This paper presents a study of the impact of horizontal aperture separation in single-sided ventilation flows with two apertures (SS2). The study is based on wind tunnel measurements and dimensional analysis. The results ...
Diapycnal mixing in layered stratified plane Couette flow quantified in a tracer-based coordinate
(Cambridge University PressJournal of Fluid Mechanics, 2017-07)
The mixing properties of statically stable density interfaces subject to imposed vertical shear are studied using direct numerical simulations of stratified plane Couette flow. The simulations are designed to investigate ...
A two-zone model for natural cross-ventilation
(ElsevierBuilding and Environment, 2015-07-01)
Cross-ventilation flows (CV) are characterized by significant inflow momentum conservation as fluid flows across an enclosed rectangular volume as a confined jet. When the inflow area is smaller than the volume cross-sectional ...
Gravity current propagation up a valley
(Cambridge University PressJournal of Fluid Mechanics, 2015-01-10)
The advance of the front of a dense gravity current propagating in a rectangular channel and V-shaped valley both horizontally and up a low slope is examined through theory, full-depth lock-release laboratory experiments ...
Stratified shear flow: experiments in an inclined duct
(Journal of Fluid Mechanics, 2014-07-22)
We present results of experiments on stratified shear flow in an inclined duct. The duct connects two reservoirs of fluid with different densities, and contains a counterflow with a dense layer flowing beneath a less-dense layer ...
Entrainment in two coalescing axisymmetric turbulent plumes
(Journal of Fluid Mechanics, 2014-07-11)
A model of the total volume flux and entrainment occurring in two coalescing axisym-metric turbulent plumes is developed and compared to laboratory experiments. The
dynamical evolution of the two plumes is divided into three ...