Effects of surface roughness with the spherical shape on the fluid flow of argon atoms flowing into the microchannel, under boiling condition using molecular dynamic simulation

摘要

This paper presents influences of roughness components with the spherical shape on the 10 million Argon atoms flowing inside the microchannel, under boiling condition using molecular dynamic simulation method. Microchannels are with cubic perspective in size of 10000*5000*5000 A(3) with roughened and smooth surfaces to be comparable in results by statistical method. Constant boiling temperature of 108 K is fixed in walls of microchannels to be transferred on the Argon fluid atoms are enforced at the inlet region of microchannels by different external driving forces in the range of 0.002-0.02 eV/Angstrom. A statistical approach is employed to analyses the effects of external force on the roughened and smooth surfaces. Finally, it is concluded that the spherical shape of roughness elements brings no destructive effect on the flow behavior when the external driving force is in the range of 0.002-0.01 eV/Angstrom. Therefore, preparing smooth surfaces by removing this type of roughness elements can be accounted as the wasted cost for real usage suchlike pharmaceutical microprobes to eradicate maladaptive or diseased cells of liver, prostate, lung and oral cancers. (C) 2019 Elsevier B.V. All rights reserved.