Regenerative cooling is considered promising in the thermal protection of hypersonic propulsion devices such as SCRamjet. However, heat transfer deterioration (HTD) hydrocarbon fuel a severe threat to structure safety, especially under axially nonuniform flux caused by load difference different components. In this work, trans-critical n-decane mini-horizontal channel numerically investigated. T...

A two-dimensional pulsating flow of a viscous fluid in plane channel whose wall has rectangular microcavities partially or completely filled with compressible gas is investigated. This problem formulation can clarify the friction reduction mechanism laminar sublayer turbulent boundary layer over textured stripped superhydrophobic surface containing periodically arranged micro-cavities gas. It a...

Liquid-infused surfaces (LIS) are a promising technique for reducing friction, fouling and icing in both laminar turbulent flows. Previous work has demonstrated that these susceptible to shear-driven drainage. Here, we report different failure mode using direct numerical simulations of channel flow with liquid-infused longitudinal grooves. When the liquid-liquid surface tension is small and/or ...

Abstract Transient flow characteristics and dissipation mechanism in pressurized pipeline were investigated based on 1D friction models 3D turbulence models, where the pressure–density model was combined into continuity equation allowing for elasticity of fluid pipes. The applicability realizable k–ε SST (shear stress transport) k–ω verified with comparison to traditional water hammer experimen...

This article discusses various issues around the Transmission Convergence (TC) sublayer in the physical layer of ATM. A brief introduction is given to the layered approach and functionality of the ATM physical layer. This is followed by an introduction to the two main TC sublayer implementations for ATM at high line rates, namely the SONET or SDH option and the CellBased option. These options a...

Measurements of spatial structure of turbulence in thick fluid layers driven electromagnetically at small scales are reported. It is shown that at modest Reynolds numbers the top sublayer behaves as quasi-2D and supports the inverse energy cascade regardless of the layer depth. The cascade survives even in the presence of strong 3D eddies developing in a layer whose depth exceeds half the forci...

We study, on an atomic scale, the influence of a single dislocation in a SrTiO3 sublayer on the local ferroelectric polarization of the neighboring ferroelectric PbZr0.2Ti0.8O3 (PZT) sublayer in an epitaxial SrTiO3/PbZr0.2Ti0.8O3/SrTiO3 three-layer heterostructure. The strain field of the dislocation in the SrTiO3 layer propagates across the interface into the PZT layer and leads to a strong va...

Turbulent drag reduction (DR) through streamwise travelling waves of the spanwise wall oscillation is investigated over a wide range Reynolds numbers. Here, in Part 1, wall-resolved large-eddy simulations channel flow are conducted to examine how frequency and wavenumber wave influence DR at friction numbers $Re_\tau = 951$ $4000$ . The actuation parameter space restricted inner-scaled (ISA) pa...

1D, 2D and 3D numerical simulations were carried out with the Reynolds-Averaged Navier-Stokes equations (RANS) for horizontal oil-water core-annular flow in which oil core stays laminar while water layer is turbulent. The turbulence described Launder-Sharma low-Reynolds number k−ϵ model. simulation results are compared experiments our lab a 21 mm diameter pipe using viscosity ratio of 1150 dens...