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This paper presents a novel way of simulating the effect of velocity decay and turbulence of wind turbine's wake flow. By decoupling the solving of wake flow from that of the velocity field, the proposed model treats the wake flow intensity as a kind of convective and diffusive virtual matter. The particle random walk method is utilized to simulate the motion of the virtual matter. Comparing to the...
An effective optimization method is presented for the shape design of the axis-symmetric wind lens aiming at velocity augmentation and drag force reduction. The profile of the wind lens is approximated by a polynomial function. Velocity and drag force are calculated by CFD (Computational Fluid Dynamics) method. The wind lens profile is optimized adopting GA (genetic algorithm). GA and CFD method are...
This paper presents an advanced mathematical model of a thermoelectric generator that includes the effect of the temperature gradient in the flow direction. The parameters of the exhaust gas from an engine may fluctuate during engine operation; thus, the influence of this fluctuation in the exhaust gas parameters on the optimal thermoelectric performance was considered with the objective of maximizing...
PDMS (Polydimethylsiloxane) is a typical material used to fabricate optofluidic microreactors for photocatalytic water splitting application. However, conventional direct catalyst coating methods are unable to load catalysts firmly and uniformly on the PDMS substrate, which results in weak bond between the catalysts and substrate and thus poor durability and performance. To resolve this problem, a...
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