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A numerical method is used to compute the unsteady transverse jets flow and study the air-fuel mixing characteristics in the unsteady flowfield. The unsteady compressible Navier-Stokes equations are solved using a high-order AUSM+ method with dual-time-step implicit time scheme. It is found that the transverse jets flowfield is very unsteady and the unsteadiness is caused by the primary vortices emanating...
The volatilization of VOC from vadose-zone soil into ambient air includes three processes: migration in soil column, molecular diffusion in viscous sub-layer, mixing and transportation in ambient air. With analysis of the migration mechanism of VOC in these three processes, a new mathematical model is developed to calculate the volatilization factor of VOC volatilizing from soil into air under evaporation...
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