In chapter 5, full 2-D reacting flow simulation of the flat flame burner was reported. A second order fit was found to be appropriate to describe the flame dynamics predicted by the CFD model. However, the phase relationship between the unsteady heat release rate (q′) and the incoming fluid stream velocity fluctuation (u′) was not correctly predicted. Also, the low frequency resonance phenomeno...

This paper presented an overview of the tools used to predict ventilation performance in buildings. The tools reviewed were analytical models, empirical models, small-scale experimental models, full-scale experimental models, multizone network models, zonal models, and Computational Fluid Dynamics (CFD) models. This review found that the analytical and empirical models had made minimal contribu...

this study introduces the differential transform method (dtm) to analyse the free vibration response of a rotating, closed section, composite, timoshenko beam which features material coupling between flapwise bending and torsional vibrations due to ply orientation. the governing differential equations of motion are derived using hamilton’s principle and solved by applying dtm. the natural frequ...

introduction: the feedback provided by auditory apparatus equips normal hearing people with an important controlling mechanism over the speech production processes. the speech of hearing-impaired children is both perceptually and acoustically abnormal. this study tried to compare the formant frequencies of three long vowels in persian-speaking children who used cochlear implant and those who we...

Competitive swimmers spread fingers during the propulsive stroke. Due to the inherent inefficiency of human swimming, the question is: does this strategy enhance performance or is it just a more comfortable hand posture? Here we show, through computational fluid dynamics (CFD) of a 3D model of the hand, that an optimal finger spacing (12 degrees , roughly corresponding to the resting hand postu...

A particle accelerated computational fluid dynamics (CFD) boundary element method (BEM) technique is proposed that allows the total sound pressure field produced by low Mach number flow past a rigid body to be predicted. An incompressible CFD solver is used to calculate the transient hydrodynamic flow field. The CFD/BEM coupling technique is then used to compute the acoustic pressure and pressu...

A novel parameterized model for temperature distribution is proposed. A framework for uncertainty quantification and global sensitivity in hypersonic aerothermoelastic analysis is developed based on this model. The uncertainty quantification and global sensitivity analysis in hypersonic aerothermoelastic analysis for control surface due to hypersonic aerothermodynamics is investigated in this s...

the aim of the present study was to develop a tissue-engineering approach through alginate gel molding to mimic cartilage tissue in a three-dimensional culture system. the perfusion biomimetic bioreactor was designed to mimic natural joint. the shear stresses exerting on the bioreactor chamber were calculated by computational fluid dynamic (cfd). several alginate/bovine chondrocyte constructs w...

Natural ventilation is crucial for conserving the energy, reducing carbon emission, and improving the comfort level of the built environment and the indoor air quality. The Computational Fluid Dynamics (CFD for short) represents the combination of the modern fluid dynamics, numerical mathematics and computer science. By employing CFD wind environment simulation technology, the architects are ab...

This paper deals with the evaluation of different simulation approaches to kitchen ventilation modelling. Multi-zone, CFD and zonal approach are discussed. The investigation moves its steps from the analysis of a controlled ventilation system intended for individual and collective housing. The question of natural ventilation being able of ensuring ventilation rates consistent with acceptable in...