A direct numerical simulation (DNS) code is constructed for solving flow across a three-dimensional deformable bluff body. In the present study, DNS of flow across rigid and compliant cylinders is performed to evaluate the code and the drag reduction effect with a compliant coating. The Strouhal number of shedding of the Karman vortex is calculated and it agrees well with that reported in the l...

After molting, stomatopods can be evicted easily from home cavities by conspecifics because these marine crustaceans lose temporarily their body armor and the use of their raptorial appendages. Some newly molted stomatopods defend their cavities with a meral spread display, a signal correlated with attack when used by animals between molts. The use of the meral spread display actually increases...

The large eddy simulation/probability density function (LES/PDF) method is applied to a turbulent swirling stratified flame series systematically investigate its performance for accurate prediction of effects stratification on flames under conditions. Cambridge/Sandia selected as target series. An augmented reduced mechanism used the methane/air combustion. chemical calculations are accelerated...

The periodic wake flow past a bluff body immersed in moving fluid can be synchronized to the harmonic vibrations of body. A low-dimensional, phase-based analysis has been adopted uncover theoretical conditions necessary for synchronization between and oscillations. present methodology allows modifying transient features unsteady flows, thereby enabling online control aerodynamic forces on flyer...

To improve the performance and efficiency of ordinary galloping energy harvesters (GEHs), this paper proposes a GEH with striped bluff body. The fluid-structure coupling simulation body oscillator harvester was carried out using COMSOL Multiphysics. cloud diagram in flow field, tip displacement at beam, lifting dragging force, trace frequency response are analyzed. Simulation results show that ...

Fluid flow around bluff bodies occurs in numerous fields of science and engineering, such as flows pass vehicles, cables, towers and bridges. These flows have been studied experimentally and numerically for the last several decades. The investigation of flow around high-speed trains is an important application of bluff bodies. Fluid flow, aerodynamic forces and moments, separation and wake regi...

Research into hypersonic flow phenomona has been conducted by numerous groups within Australia for over 40 years. The genesis of all the modern day work can be traced back to the return of the then Dr Ray Stalker from England, to take a faculty position in the Physics Department of the Australian National University, Canberra, in 1962. Dr Stalker had a keen interest in the aerodynamics of bodie...

The Fourth International Workshop on Measurement and Computation of Turbulent Nonpremixed Flames (TNF4) was hosted by the Darmstadt University of Technology and was attended by 87 researchers from 10 countries. The main topics of discussion included: results for the piloted CH4/air jet flames D, E, and F progress on calculations of bluff-body stabilized flames progress on LES for combustion exp...