A free-shear flow driven by both initial momentum and buoyancy is a buoyant jet. Turbulent buoyant jets spread in a direction normal to their primary-flow direction by incorporating irrotational ambient fluid into the ...

In the present study, we have implemented a three-dimensional direct numerical simulation (DNS) algorithm for the purpose of studying instability and transition in a Poiseuille flow with imposed unstable stratification. ...

Liquid drops supported on solid surfaces are commonly encountered in nature and in industries. While their aesthetically pleasing shapes and motion generate curiosity, the understanding of these shapes and their dynamics ...

Taylor-Couette flow is the annular flow between two concentric, differentially rotating cylinders. Figure 1.1 shows the geometry of the setup and is taken from Taylor [39]. Due to its geometric simplicity, this flow has ...

In the recent past, we have begun to recognize many of the benefits that Micro Air Vehicles (MAV’s) may have. The important ones being, their small size and high manoeuvrability, which makes them suitable for reconnaissance, ...

Fluids have fascinated many generations of scientists and engineers. Although a considerable amount of research has been devoted to the study of uids of low molecular weight (well described by the Navier-Stokes equations), ...

Multiparticle collision dynamics (MPCD) is a particle based mesoscopic simulation technique for incorporating hydrodynamics and thermal fluctuations in complex fluid simulations. Due to its simplicity, theMPCD algorithm ...

High fidelity aerodynamic shape optimization using the adjoint method for gradient calculation is presented for an aircraft wing with particular emphasis on designing wings for propeller-driven aircraft with lower induced ...

Differential operators such as gradient, curl, laplacian and divergence used in vector algebra follow certain identities and symmetries, which often is absent in their discrete counterpart. For example, the laplacian ...

We study the merger of three or more identical co-rotating vortices initially arranged on the vertices of a regular polygon, and compare it to the merger of two like-signed vortices. The latter is a well-studied problem, ...