Multi-scale Channel Structure Optimization Of Bionic Plant Leaves

Multi-scale channel network structure is widely used in industry,agriculture,biology and other fields.In this paper,the mathematical model of multi-scale channel network structure is established,the main factors affecting power consumption are analyzed and the corresponding optimization is made.This study can provide theoretical basis for engineering design and analysis of plant blade fluid transport.The main work and conclusions are as follows:(1)In this paper,the line-to-area flow process of the side wall infiltration in the last stage channel is optimized.For the parallel channel,there exist optimal channel diameter ratio and channel spacing to minimize the power consumption.When the channel spacing is fixed,the channel volume ratio increases,the power consumption decreases,and the optimized diameter ratio increases.When the length width ratio increases,the power consumption increases,and the optimized diameter ratio increases.When the permeability of porous media area increases,the power consumption decreases,and the optimized diameter ratio increases.The minimum power consumption is lower than that of the optimal design of the two-scale channel.(2)Taking the bionic network vein channel as an example,the point-to-area flow process using the mid-point penetration of the channel is optimized.The conclusion is that there is an optimal channel diameter ratio to minimize the power consumption of the basin,and the channel spacing has little effect on the total power consumption of the basin.In the reticulated channel,the first and fourth stage channels play a dominant role in power consumption,while the second and third stage channels have little effect on power consumption.(3)In view of the support structure of the mesh channel,a three-dimensional model is established and the static analysis is carried out.The results show that the volume ratio of the channel is negatively related to the maximum deformation and displacement of the basin,and there is a certain thickness ratio of the support area to minimize the deformation of the support structure when the volume ratio of the channel is fixed.(4)When the fluid is non-Newtonian,the line surface flow process of side wall infiltration in the last stage of parallel vein was optimized.The results show that the greater the power-law exponent is,the greater the internal resistance of the fluid is.