Fundamentals of Computational Fluid Dynamics

Abstract

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State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

“…Studies on this topic have presented solutions to the cavitation problem in draft tubes, the vibration effect in powerhouses caused by the operating turbine, the maximization of power generation, and the generation of low-cost power [85,89]. Fluid computational tools have rapidly developed in the field of CFD [147][148][149][150], enabling robust and reliable analysis of the flow pattern inside the turbine structure.…”

Simulating In-Situ Leaching Process Using Comsol Multiphysics

“…Uranium minerals constitute hundredths and tenths of a percent; they have different shape and size, form films, sinters, crusts on grains or are embedded in aggregate structures of ores. [2] The leaching process (ISL) comprises three main stages: -Transportation of solvent to the surface of uranium minerals; -Chemical reaction with the formation of soluble uranium salts; -Transportation of the dissolved reaction products into the solution. During the ISL of uranium from ores the transportation of the solvent to the surface and dissolved products from the interreaction place is determined by the solution infiltration rate.…”

“…At the same time there are a number of ISL technology modes, such as "saturated mode," "pressure filtration" mode, or infiltration mode, which are to be determined according to measured process variables. [1,2] In-situ leaching is a process in which involves dissolving the useful component by a chemical reagent in the ore body resting place followed by the export of the formed compounds from the reaction zone by the moving stream of solvent. Leaching is a diffusion process, which presents transition of system components from a solid phase to a liquid phase.…”

Fluid distribution optimization in porous media using leaf venation patterns

“…Indeed, the actual first step when solving the equations which govern fluid flow computationally is mesh generation. The mesh is simply a representation of the geometric domain of a system by a finite set of nodes [32,33,90]. Variable values, e.g., pressure and velocity field values, are stored and computed at those nodes, as opposed to the continuum space of a system.…”

“…Lastly, we declare that the examples in the following sections were adapted from material found in our references, mostly from Ferziger, Versteeg, Lomax or Pozrikidis [32,33,90,91]. This was done in an attempt to make this review of the CFD approach and the FV method as brief and comprehensive as possible.…”