Surfactant transport is central to a diverse range of natural phenomena with numerous practical applications in physics and engineering. Surprisingly, this process remains relatively poorly understood at the molecular scale. Here, we use non-equilibrium dynamics (NEMD) simulations study spreading sodium dodecyl sulphate on thin film liquid water. The form control volume extended coordinate system moving liquid–vapour interface track surfactant spreading. We compare NEMD results continuum...

Heat pipes frequently encounter challenges in effectively returning condensed liquid from the condenser to evaporator through capillary pumping, which limits their overall efficacy. When pumping becomes irrelevant due factors like an absent wick or overfilling, heat pipe is more properly termed a thermosyphon. In close-to-horizontal orientation, driving force for return thermosyphon relies on difference pool depth between and condenser. An excessively deep can hinder radial transfer,...

Abstract Thin films, bubbles and membranes are central to numerous natural engineering processes, i.e., in solar cells, coatings, biosensors, foams, emulsions. Yet, the characterization understanding of their rupture is limited by scarcity atomic detail. We present here complete life-cycle freely suspended films using non-equilibrium molecular dynamics simulations a simple fluid free surfactants surface impurities, thus isolating fundamental mechanisms. identified short-term ‘memory’...

ABSTRACT Detailed heat-flow studies in the Alberta part of Western Canadian Sedimentary Basin show that hydrodynamically controlled geothermal pattern and depth-temperature distribution Mississippian Devonian oil gas pools are related. Cooling below Rocky Mountain Foothills deep basin, caused by gravity-imposed downward water movement, results low gradient values burial oil-generation 'window'. An increase gradients shallower eastern rising fluid flow, brings 'window' closer to surface. It...

The retraction of thin films, as described by the Taylor-Culick (TC) theory, is subject to widespread debate, particularly for films at nanoscale. We use non-equilibrium molecular dynamics simulations explore validity assumptions used in continuum models tracking evolution holes a film. By deriving new mathematical form surface shape and considering locally varying tension front retracting film, we reconcile original theory with our simulation recover corrected TC speed valid

The evolution of the liquid-vapor interface a Lennard-Jones fluid is examined with molecular dynamics simulations using intrinsic sampling method. Results suggest clear damping profiles increasing temperature. Investigating surface stress distribution, we have identified linear variation space-filling nature (fractal dimension) clusters at tension or, equivalently, decreasing A percolation analysis these networks indicates that field more disjointed higher temperatures. This leads to fragile...

A bstract The heat flow equation in cylindrical coordinates is solved numerically for any general distribution of thermal diffusivity. temperature stabilization a borehole considered, and solutions the case where diffusivity function radial distance from are obtained compared to uniform results discussed terms diffusivities that different well contents surrounding material. It found approach formation affected by differences between region.

In the present study, a numerical investigation is carried out on aerodynamic performance of supercritical airfoil RAE 2822. Transonic flow fields are considered where self-excited shock wave oscillation prevails. To control oscillation, passive technique in form an open rectangular cavity introduced upper surface oscillates. Reynolds Averaged Navier-Stokes (RANS) equations have been used to predict behavior baseline and with at Mach number 0.729 angle attack 5°. The characteristics well...

A bstract There is a significant increase in terrestrial heat flow with depth the Hinton‐Edson area of deep part western Canadian sedimentary basin Alberta. This especially true near Rocky Mountain foothills which an high relief, hydraulic head and regional water recharge. Gravity‐imposed downward movement meteoric through thick strata velocities as low 10 –10 m/s to 0.5 × –9 may cause depth. Such disturbance on scale means that it not possible determine background conductive steady‐state...

When droplets roll down inclines, their velocities are affected by characteristic size. Larger will travel faster unless they're too big. Droplets larger than a ``critical'' size more slowly. An investigation shows that this critical is determined the viscosity of surrounding medium.

Surfactant transport is central to a diverse range of natural phenomena, and for many practical applications in physics engineering. Surprisingly, this process remains relatively poorly understood at the molecular scale. This study investigates mechanism behind surfactant monolayers on flat curved liquid vapor interfaces using nonequilibrium dynamics simulations, which are compared with continuum model. approach not only provides fresh level insight into dynamics, but also confirms nanoscale...

In this study, we present experimental and theoretical analyses of evaporating a double-emulsion drop resting on substrate. Multistage evaporation the outer inner droplet is witnessed. The complete initialization demonstrate an interesting transition dynamics. After apparent completion phase drop, surprisingly, formation daughter observed. We further investigated to hypothesize phenomenon achieved for single-phase as well. While engineering "daughter formation" phenomena, also proposed way...

A gauged chiral-Lagrangian model for charmed-meson decays is proposed. The ${0}^{+}$ uncharmed mesons are included in the to account S-wave hadronic final-state interactions. All hadron fields incorporated into phenomenological Lagrangian through general framework proposed by Coleman, Wess, and Zumino. correctly predicts branching ratios of various two-body D-meson decay modes both Cabibbo-angle-favored Cabibbo-angle-suppressed channels, with only exception...

ABSTRACT A numerical integration approach is used with Lopatin's method to calculate time-temperature-index (TTI) values which indicate the degree of maturation organic material from knowledge sedimentary basin history and geothermal gradients in southern Alberta. Waples' derive vitrinite reflectance (Ro) calculated TTI, these are compared measured Hacquebard (1977). Analytical expressions that relate TTI Ro derived for different ranges TTI. Late Cretaceous Tertiary burial caused levels rise...

Heat pipes frequently encounter challenges in effectively returning condensed liquid from the condenser to evaporator through capillary pumping, which limits their overall efficacy. When pumping becomes irrelevant due factors like an absent wick or overfilling, heat pipe is more properly termed a thermosyphon. In close-to-horizontal orientation, driving force for return thermosyphon relies on difference pool depth between and condenser. An excessively deep can hinder radial transfer,...

Thin films, bubbles and membranes are central to numerous natural engineering processes, i.e., in thin-film solar cells, coatings, biosensors, electrowetting displays, foams, emulsions. Yet, the characterization an adequate understanding of their rupture is limited by scarcity atomic detail. We present here complete life-cycle freely suspended films using non-equilibrium molecular dynamics simulations a simple fluid free surfactants surface impurities, thus isolating fundamental mechanisms....

In this study, we present experimental and theoretical analyses of double emulsion drop evaporation. After the apparent completion evaporation inner phase a drop, surprisingly, resurfacing daughter droplet is observed. We further investigated to hypothesize phenomenon which allowed us obtain prolonged fixed contact line for single along with similar occurrence as drops.