porous silicon samples were prepared by electrochemical etching method for different etching times. the structural properties of porous silicon (ps) samples were determined from the atomic force microscopy (afm) measurements. the surface mean root square roughness (σ rms) changes as function of porosity were studied, and the influence of etching time on porosity and roughness was studied too. u...

A numerical approach called “SIMPLER” is used to investigate the  flow and heat transfer characteristics in a square driven cavity. The two-dimensional incompressible Navier-Stokes equations were solved and the results are depicted as contour plots of stream function, vorticity, and total pressure for Reynolds numbers from 1 to 10000. At the higher values of Reynolds number, an inviscid core re...

A Zn4L4 coordination cage enabled entrapment of gases in both solution and the amorphous solid state at atmospheric pressure. The lipophilic cavity was designed through a cavity-filling strategy, which could bind small hydrocarbon gases. contrasting selectivity gas capture observed state, showing potential to be engineered as porous liquids or adsorbents for separation.

The problem of pure thermovibrational flow in a two-dimensional square cavity containing viscoelastic liquid is investigated the framework numerical approach based on governing balance equations for mass, momentum, and energy their complete non-linear time-dependent form. For closure, these are complemented with transport equation elastic stress formulated using finitely extensible nonlinear Ch...

This study presents numerical simulations on double-diffusive flow of a nanofluid in two cavities connected with four vertical gates. Novel shape an outer square mounted cavity by gates was used. Heterogeneous porous media and Al 2 O 3 -water are filled...

INTRODUCTION: Porous hydroxyapatite (HAp) has been used as a bone substitute instead of autogenous bone grafts because of no donor site morbidity, fewer complications, as well as osteoconductivity. Previously, we reported a novel unidirectional porous hydroxyapatite (UDPHAp) with a porosity of 75% and a microstructure consisting of cross-sectional oval pores (diameter, 100–300 μm) that penetrat...