A large number of bubbles generated by the air agitation device in an external melting ice storage system can cause disturbance ice–water mixture, which enhance heat transfer and contribute to reduction energy consumption. The structural design optimization is key issue for savings. In this study, influence different orifice spacings diameters on distribution gas–liquid flow field, gas holdup, ...

An external liquid circulation is introduced into a traditional internal loop reactor in order to improve liquid circulation and increase the interface between gas and liquid phases. The effects of superficial gas velocity and external liquid circulation velocity on local and overall gas holdups are explored experimentally and numerically in the loop section of a combined gas-liquid contactor, ...

Fluidized beds can be used to gasify biomass in the production of producer gas, a flammable gas that can replace natural gas in process heating. Modeling these reactors with computational fluid dynamics (CFD) simulations is advantageous when performing parametric studies for design and scale-up. From a computational resource point of view, two-dimensional simulations are easier to perform than ...

In November 2008, the Federal Trade Commission petitioned the Supreme Court to review the D.C. Circuit’s decision in FTC v. Rambus. That decision reversed the Commission’s finding that Rambus knowingly failed to disclose a patent to a standard setting organization and, in so doing, acquired monopoly power in violation of Section 2 of the Sherman Act. In February 2009, the Supreme Court denied t...

Numerical simulations of the small bubble-big bubble-liquid three phase heterogeneous flow in a square cross-sectioned bubble column were carried out with the commercial CFD package CFX-4.4 to explore the effect of superficial velocity and inlet dispersed phase fractions on the flow patterns. The approach of Krishna et al. (2000) was adopted in the Euler-Euler framework to numerically simulate ...