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An electromagnetic microvalve which can be used in pneumatic pressure control for lab-on-a-chip applications is presented and its structure, working principle, and encapsulation process with valve body fabricated by using polydimethylsiloxane (PDMS) are provided. The numerical simulation of flow filed under several opening degrees of the microvalve is made by software Fluent with UDF Function, and...
Natural ventilation is an effective method to simultaneously improve indoor air quality and reduce energy consumption in buildings, especially when indoor temperature is close to ambient temperature e.g. the transitional seasons in Germany. Heat loss due to opened window and ventilation effectiveness ratio were analytically modeled. Following that, the effects of thermal buoyancy on the steady classroom...
The flame-holding mechanism in hypersonic propulsion technology is the most important factor in prolonging the duration time of hypersonic vehicles. The two-dimensional coupled implicit Reynolds-averaged Navier-Stokes equations, the shear-stress transport k-ω turbulence model and the finite-rate/eddy-dissipation reaction models were used to simulate the combustion flow field of a typical strut-based...
The coolant flow field distribution affects the cooling effect of internal combustion (IC) engine. Simulated calculation is applied in the engine water jacket structure design process more and more because the method can predict the complex flow phenomena in the engine cooling water jacket. In order to summarize the design experience for the separate type water jacket, many kinds of improved 3D models...
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