In this work, a numerical simulation study on the mixing characteristics of multiphase flow in an autoclave was carried out using CFD technology. The Eulerian–Eulerian model and discrete phase (DPM) were employed to investigate solid holdup, critical suspension speed, nonuniformity suspension, gas holdup distribution, bubble tracks, residence time during stirring leaching autoclave. Experiments...

Molecular diffusion in brain extracellular space (ECS) is primarily controlled by interactions with the geometry and the interstitial matrix. Both factors increase λ, the tortuosity, a measure of hindrance to diffusion where λ2 = D/D∗ with D the free diffusion coefficient and D∗ the effective diffusion coefficient in brain [1]. Geometry lengthens diffusion paths or creates holdup in local voids...

Pressure hydrometallurgy has attracted much attention for its characteristics, such as the high adaptability of raw materials and environmental friendliness. Flashing (flash boiling or flash evaporation) refers to phase change phenomenon from liquid gas triggered by depressurization, which is an important connection between high-pressure processes atmospheric ones in pressure hydrometallurgy. T...

The fluid dynamic (flow rates) and hydrodynamic behavior (local droplet size distributions local holdup) of a continuous DN300 pump-mixer were investigated using water as the phase paraffin oil dispersed phase. influence impeller speed (N = 375 to 425 rpm), feed ratio (φF 10 30 vol.-%), flow rate (V˙tot ≈ 0.5 2.3 L/min) by measuring pumping height, holdup disperse phase, distribution (DSD). lat...

We examine the incentives for firms to vertically integrate through acquisitions and production. We develop a new firm-specific measure of vertical integration using 10-K text to identify the extent a firm’s products span vertically related product markets. We find that firms in high R&D industries are less likely to vertically integrate or become targets in vertical acquisitions, and are more ...

We propose a method by which to analyze silhouettes and recognize a classic holdup position of armed robbery. In such a situation, one actor levels his or her arm while another actor raises his or her arm(s) into the air. We attempt this by first segmenting the skeleton of the silhouette into separate pieces of the body, then identifying the positions of the arms.

In this paper we develop the first search-theoretic monetary model of a two-country global economy. We show the connection between deep monetary frictions (i.e. search and matching frictions), capital holdup externalities, and the realization of an endogenous departure from the “excess smoothness” problem in the real exchange rate found in standard models. Using this alternative monetary model,...

Correlating Pressure Drop and Liquid Holdup Werner van der Merwe , Dylan Loudon and Willie Nicol a Department of Chemical Engineering, University of Pretoria, South Africa b Fischer-Tropsch Refinery Catalysis, Sasol Technology Research and Development # Correspondence to: Department of Chemical Engineering, University of Pretoria, Pretoria 0002, South Africa, Tel: +27-12-420-3796, Fax: +27-12-3...

Typical liver cell inclusions of alpha-1-antitrypsin deficiency were found in a patient with the Pi S phenotype and acute alcoholic hepatitis. It is suggested that the inclusions resulted from the combined effects of the S phenotype and alcohol and, on the basis of the known chemistry of the variant antitrypsins, that the lowered serum concentration of antitrypsin associated with the S allele m...