The Model of Masstransfer Intensification in Channels Using Nanowiresets inside and Nanostructures on the Wall

[摘要] The gas and liquid mass transfer intensification is studied using nanowires placed in the flow as well as nanostractures organized on the channel wall. The results of the study can be applied to a drag reduction of the gas and liquid transport in channels. The model of drag reduction is developed using the set of submicronwires placed into the flow. On the wires surface the gas slippage in Knudsen layer is observed. The slippage results in a mass transfer intensification. The sets of wires placed near the channel axis of symmetry as well as placed close to the channel wall are analyzed for both types of cannel surface that are smooth or have the submicron roughness. The slip boundary condition on the surface of a submicron wire and the subsequent averaging procedure over the set of wires are applied to find the intensity of gas slippage as a function of number density of wires distribution as well as of wires shape. The results of numerical simulation of gas transport under a given pressure drop in channels demonstrate the drag reduction up to 300 percent.

[发布机构] A. Ishlinsky Institute for Problems in Mechanics, RAS Vernadsky Street 101(1), Moscow; 119526, Russia^1

[效力级别] 力学 [学科分类] 力学，机械学

[关键词] Channel wall;Gas and liquid transports;Gas slippage;Gas transport;Knudsen layer;Number density;Slip boundary conditions;Sub-micron wires