Direct Numerical Simulation of Blasius Flow Transition.

Numerical studies of bypass transition in the Blasius boundary layer

Experimental findings show that transition from laminar to turbulent flow may occur also if the exponentially growing perturbations, eigensolutions to the linearised disturbance equations, are damped. An alternative non-modal growth mechanism has been recently identified, also based on the linear approximation. This consists of the transient growth of streamwise elongated disturbances, with reg...

outflow Boundary Codition Issues in Direct Numerical Simulation of Three- Dimensional Plane Wake Flow

Parallel Spatial Direct Numerical Simulation of Boundary-Layer Flow Transition on IBM SP1

The spatially evolving disturbances that are associated with laminar-to-turbulent transition in threedimensional boundary-layer ows are computed with the PSDNS code on an IBM SP1 parallel supercomputer. By remapping the distributed data structure during the course of the calculation, optimized serial library routines can be utilized that substantially increase the computational performance. Alt...

Evaluation of Recirculation Time in Bubble Train Flow by Using Direct Numerical Simulation

In this research, hydrodynamics of the Bubble Train Flows (BTF) in circular capillaries has been investigated by Direct Numerical Simulation (DNS).The Volume of Fluid Based (VOF) interface tracking method and streamwise direction periodic boundary conditions has been applied. The results show that there exists an appropriate agreement between DNS and experimental correlation results. The re...

Application of HPCN to Direct Numerical Simulation of Turbulent Flow

This poster shows how HPCN can be used as a pathnding tool for turbulence research. The parallelization of direct numerical simulation of turbulent ow using the data-parallel model and Fortran 95 constructs is treated, both on a shared memory and a distributed memory computer. Introduction Computer simulation has become a major tool for studying turbulent ow in many technological and environmen...