MOLECULAR DYNAMICS SIMULATION ON THE FRICTION PROPERTIES OF COUETTE FLOW WITH SUPERHYDROPHOBIC ROUGH SURFACES UNDER DIFFERENT LOAD

CZ Hu and DW Tang and JZ Lv and ML Bai and XL Zhang, PROCEEDINGS OF THE ASME SUMMER HEAT TRANSFER CONFERENCE, 2019, V001T12A002 (2019).

To reveal the effect of superhydrophobic rough surface on the friction properties, molecular dynamics simulations are used to study the friction properties of Couette flow. In particular, the influence of load on the flow properties is considered in this work. Results show that there is a critical load (P-crit), and the friction-reduction properties of superhydrophobic surfaces with stripes are only presented when the load is smaller than the P-crit. With the decrease in the distance between stripes, the P-crit is increased. Under a low load, the friction force is increased with increasing the distance between stripes. However, under high load condition we observe an opposite trend. The height of stripe has little impacts on the P-crit.

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