微通道中Poiseuille流动的分子动力学研究

flow model between two parallel plane walls was established for argon fluid through a microchannel under the condition of action of pulsating external force. Based on this model, two kinds of wall (hydrophilic and hydrophobic) were applied on the flow simulation. The velocity profile and temperature profile of argon fluid in hydrophilic microchannel predicted by molecular dynamics simulation are in good agreement with the analytical solution based on the Navier–Stokes and energy equations. The velocity profile and the temperature profile experience a large jump in the layers close to the hydrophobic wall. The results also show that the total energy of the hydrophobic system is higher than that of hydrophilic system. This phenomenon can be interpreted by that the hydrophilic wall has higher performance in heat transfer than one of hydrophobic wall.