Surface Tension-Driven Flow and Its Correlation with Mass Transfer during L-DED of Co-Based Powders

Surface Tension-driven Flow in A

We consider an inviscid fluid, initially at rest inside a wedge, bounded by one free surface and one solid surface. When t = 0, we allow the contact angle to change discontinuously, which leads the free surface to recoil under the action of surface tension. As noted by Keller and Miksis [SIAM J. Appl. Math., 43 (1983), pp. 268–277], a similarity scaling is available, with lengths scaling like t...

13 Effects of Surface Tension on Mass Transfer Devices

Flow rate analysis of a surface tension driven passive micropump.

A microfluidic passive pumping method relying on surface tension properties is investigated and a physical model is developed. When a small inlet drop is placed on the entrance of a microfluidic channel it creates more pressure than a large output drop at the channel exit, causing fluid flow. The behavior of the input drop occurs in two characteristic phases. An analytical solution is proposed ...

Backward flow in a surface tension driven micropump

A surface tension driven micropump harnessing the pressure difference generated by drops of different curvature radii proves to be a simple and attractive passive method to drive fluid flow in microdevices. Here we observed the appearance of backward flow when the initial sizes of the droplets at the inlet and outlet ports are similar. To explain this phenomenon several hypotheses have been inv...

Heat and mass transfer of nanofluid over a linear stretching surface with Viscous dissipation effect

Boundary Layer Flow past a stretching surface with constant wall temperature, of a nanofluid is studied for heat transfer characteristics. The system of partial differential equations describing such a flow is subjected to similarity transformations gives rise to a boundary value problem involving a system of ordinary differential equations. This system is solved by a shooting method. Effect of...