Study on the effect of convex and convex plate layout on the flow performance of microflow channels
Currently, the electrolytic cell plates are mostly arranged in the form of ball-convex-ball-concave combination to enhance the disturbance-resistant ability inside the channel and improve the uniformity of fluid distribution. To improve the flow field distribution inside the channel, this paper compares the flow field distribution characteristics of five different ball-convex-ball-concave arrangements using numerical simulation. Our simulation results show the five different ball-concave-ball-convex unit combinations are characterized by vortex motion at the inlet of the channel, and the vortex motion at the inlet of the case A square spreading row in the arrangement mode is smaller;the different ball-convex-ball-convex arrangement modes will affect the distribution of the flow field, and the formation of continuous low-speed trailing area between the ball-convex-ball-convex units will form a large velocity gradient; the distribution of the temperature field and the distribution of the velocity are generally negatively correlated; the distribution of the temperature field and the velocity distribution of all channels is generally negatively correlated;the distribution of temperature field and fluid velocity distribution are largely negatively correlated; the flow channels of the five types of arrangement have negative velocity region with velocity component uw, which corresponds to a larger turbulent kinetic energy;the arrangement form of concave and convex cells inside the channel affects the local flow details and improves the uniformity of the flow field distribution, among which the uniformity of the internal flow field of the square paralleling column of case A is the best.
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