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Formation of voids (micro-pores) in a vicinity of a pin electrode in a highly non-uniform electric field applied within a few nanoseconds was proposed recently as a main mechanism of electrical breakdown of liquid dielectrics1. We solve the problem of fluid dynamics when voltage pulse duration of 7 ns with a peak value of 300 kV was applied to a spherical electrode — plane setup. Motion of liquid...
The present paper investigates the effects of rotation on flow resistance of the flow passing through the rotor-stator gap of radial flux electrical machine. Rotational pressure loss was measured and compared with the results predicted using computational fluid dynamic (CFD) methods. By using dimensional analysis, correlation for the shock loss coefficient is proposed. It provides a significant contribution...
Supersonic flow over a compression expansion corner is simulatednumerically. Three-dimensional Navier-Stokes equations have been solvedovercompression expansion corner for validation of in- house three dimensional Navier stokes code. Steger and warming flux vector splitting scheme has been used. Simulation captures all the features of complex flow problem including formation of oblique shock, expansion...
During the process of asphalt foaming, the control of spraying synchronism and fluid ratio of asphalt and water is the key to the quality of foamed asphalt. Newtonian fluid and nonNewtonian fluid's pipeline dynamic characteristics are studied by utilizing the sectional concentrated parameters modeling which including the dynamic friction item. To spraying water and asphalt in different pipes, the...
In this digest, we present a numerical simulation to predict position errors of a hard disk drive undergoing a long seeking-and-settling process while experiencing a shock excitation. The seeking-and-settling process consists of four segments: acceleration, coasting, deceleration, and settling. A 2-ms shock excitation is applied to each segment of the seeking-and-settling process respectively to evaluate...
The authors present a comparative study of the responses of burn patients to different reanimation treatments, one of them designed by experimental and clinical methods, and another one (BET) designed by digital simulation in a burn injury simulator. The alterations of the capillary dynamics and the therapeutics after the burn injury are analyzed with the mathematical model. The optimum treatment...
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