Flow Characteristics of Three-Dimensional Microscale Backward-Facing Step Flows

The effect of nanofluids flow on mixed convection heat transfer over microscale backward-facing step

“…Even though it has a very simple geometry, the flow over a backward facing step demonstrates the most important flow structures concerning with the separation and reattached flow [21]. Very little studies have considered in their investigations the fluid flow characteristics and the thermal behavior over microscale backward-facing step such as Hsieh et al [22] and Xue et al [23,24].…”

Free-molecular and near-free-molecular gas flows over backward facing steps

“…Reviewing existing studies on rarefied gas flows over micro-steps (Beskok 2001;Baysal et al 2004;Xue et al 2005;Hsieh et al 2010;Bao & Lin 2011;Darbandi & Roohi 2011;Mahdavi et al 2014;Mahdavi & Roohi 2015;Gavasane et al 2018), the current work presents several new findings that are of fundamental and practical significance. In contrast to the common view, it is first demonstrated that step detachment may occur at free-molecular conditions, identified by a unique velocity profile.…”

“…More recently, Gavasane, Agrawal & Bhandarkar (2018) demonstrated the occurrence of the Knudsen paradox in a micro-step channel geometry. The counterpart three-dimensional problem was earlier considered by Hsieh, Hong & Pan (2010).…”

DSMC simulation of rarefied gas flow over a 2D backward-facing step in the transitional flow regime: Effect of Mach number and wall temperature

“…22 proposed a Langmuir slip boundary condition combined with the continuum-based compressible Navier-Stokes equation and implemented the same for the flow over BFS. Hsieh 23 investigated the fluid flow properties in the slip regime for the flow over 3 D microscale BFS using the DSMC method. Beskok 24 developed a velocity-slip boundary condition that was based on obtaining the information of slip at a distance of one mean free path away from the surface and compared the same with the DSMC results, which were found to agree with each other.…”