Abstract The current research deals with the fully developed forced convection through metallic foam partly filled annulus. A was adhered to inner and outer walls of annulus in such a way that two regions one open region were formed against fluid flow. surfaces exposed an asymmetric heat flux ratio. To couple transfer flow regions, no-slip coupling conditions considered at fluid–solid interface...

OBJECTIVE In the deep microenvironments of advanced human atherosclerotic lesions, the intimal fluid becomes acidic. We examined the effect of an acidic extracellular pH on cholesterol removal (efflux) from primary human macrophages. METHODS AND RESULTS When cholesterol efflux from acetyl-low-density lipoprotein-loaded macrophages to various cholesterol acceptors was evaluated at pH 7.5, 6.5,...

Hydraulic accumulators (HAs) have been used successfully in regenerative braking systems by companies such as Ford and Eaton Corp. to increase fuel efficiency of heavy vehicles by as much as 25-35%. However, the relatively low gravimetric and volumetric energy densities of conventional HAs prohibit their use in average-sized passenger vehicles. In an attempt to address this problem, an elastome...

In this paper, high density rigid polyurethane foam is used as sandwich skeleton and shear thickening fluid material core. A fluid/polyurethane structure with light impact resistance was designed fabricated. High strain rate test carried out. It found that STF-2/PU reached the peak load of 4978N in 13 ms after receiving 20 J energy, energy absorption ratio 43%. The honeycomb prepared by seconda...

The brass tubes with foam cores of AlSi7SiC3, AlSi7SiC3Fe1 and AlSi7SiC3Fe3 were produced as the crush-boxes with circle and square cross-section. Then axial compressive behavior and energy absorption capability of the foam-filled tubes were investigated during the quasi-static progressive plastic buckling. The uniaxial compressive stress–strain curves of the foam-filled brass tubes exhibited t...

Foam injection is widely applied in amounts of fields to drilling, production, and formation protection. Sometimes, the application result is disappointing, which is caused by the failure of bubble generation in foam flooding. Therefore, it is necessary to seek ways for improving the performance of foam injection. An increased disturbance to the stratum, like the vibration caused by a seismic o...

A computational methodology is proposed to describe the fluid transport in compressed opencelled metallic foams. Various unit-cell foam geometries are numerically deformed under uniaxial loads using a finite element method. An algorithm is developed and implemented to deform the fluid domain mesh inside the unit-cell foam based on the deformed solid unit-cell geometry. Direct simulations of the...

We present a novel method for creating small scale details as splashes and foam for Smoothed Particle Hydrodynamics (SPH) simulations. In our technique, each fluid particle can become a source emitter of splash particles. The probability of emission is controlled by density decay and velocity of fluid particles. Splash particles are uncoupled, collide only with obstacles and follow only ballist...

milk-based espresso coffee is one of the most popular beverages. foam is an essential quality characteristic for this beverage. foam formation and stability is mainly related to the milk composition. in this study the influence of three different concentrations of xanthan gum (0.05, 0.1 and 0.2 g dm-3) and three different temperatures (50, 60 and 70 °c) on foam stability were examined and exper...

Anisotropic polymer foams have been prepared, which exhibit a Poisson's ratio exceeding 1, and ratios of longitudinal to transverse stiffness exceeding 50. The foams are as much as 20 times stiffer in the longitudinal direction than the foams from which they were derived. The transformation process involved applying a uniaxial stress sufficient to produce 25% to 45% axial strain to open-cell po...