The significant interpretation of this model is to explore the influence temperature-dependent heat source/sink on laminar free-convective flow in an annular porous region such as petroleum engineering, thermal technique and groundwater hydrology. For a unified solution Brinkman-Darcy model, regulatory equations solved analytically by applying variation parameter terms Bessel's functions for so...

If a baby starts to cry several hours after drinking his last bottle, his mother knows precisely what he's feeling: He's hungry. But suppose a woman's eyes brim with tears while she watches a DVD. Her husband sinks into the couch: What is she so upset about? She might tell him directly: "This movie is so tragic. It's all about a doomed romance." That may be true. But she could be thinking about...

The present study addresses the problem of ignition of a single sodium droplet, which is an important issue for the nuclear facilities safety. The study follows the approach of previous works and extends the results of those papers to the case of radiative heat loss. The contribution of the thermal radiation is taken into account based on the P-1 approximation for thermal radiation transfer. An...

in order to investigate of the effects of water stress on seed yield and gas exchange and to evaluate the relationship between source and sink in sunflower azargol variety, a split-plot factorial field experiment was conducted in 2008. in this experiment, water stress (no irrigation from 30 days after sowing till ripening) and irrigation (irrigation at -3 bar soil water potential) were consider...

Ratiometric laser induced fluorescence (LIF) thermometry is developed as a tool for temperature measurements using microscale visualization methods. Rhodamine B (RhB) and Rhodamine 110 (Rh110) are used as the temperature-dependent and temperature-independent dyes, respectively. The temperature responses of the two dyes are carefully measured as a function of concentration. The traditional twody...

The dendritic patterns of magnetic flux motion formed during field penetration into an MgB2 film were observed using magneto-optic imaging. To investigate the origin of the dendrites, experiments were performed where the sample was partially covered with an thermally conducting foil serving as an efficient heat sink. We observed that the dendrites are formed only in areas lacking the thermal co...

Two differently-produced open-cell aluminum foams were compared to a commercially available finned heat sink. Further, an aluminum plate and block were tested as a reference. All heat sinks have the same base plate dimensions of four by six inches. The first foam was made by investment casting of a polyurethane preform and has a porosity of 0.946 and a pore density of 10 pores per linear inch. ...