Author: Shrikanth RaoPublisher:
ISBN:
Category :
Languages : en
Pages : 174
Book Description
A Probability Density Function Time-scale Model for Combustion Using Large Eddy Simulation
Author: Shrikanth RaoTurbulent Combustion Modeling
Author: Tarek EchekkiPublisher: Springer Science & Business Media
ISBN: 9400704127
Category : Technology & Engineering
Languages : en
Pages : 496
Book Description
Turbulent combustion sits at the interface of two important nonlinear, multiscale phenomena: chemistry and turbulence. Its study is extremely timely in view of the need to develop new combustion technologies in order to address challenges associated with climate change, energy source uncertainty, and air pollution. Despite the fact that modeling of turbulent combustion is a subject that has been researched for a number of years, its complexity implies that key issues are still eluding, and a theoretical description that is accurate enough to make turbulent combustion models rigorous and quantitative for industrial use is still lacking. In this book, prominent experts review most of the available approaches in modeling turbulent combustion, with particular focus on the exploding increase in computational resources that has allowed the simulation of increasingly detailed phenomena. The relevant algorithms are presented, the theoretical methods are explained, and various application examples are given. The book is intended for a relatively broad audience, including seasoned researchers and graduate students in engineering, applied mathematics and computational science, engine designers and computational fluid dynamics (CFD) practitioners, scientists at funding agencies, and anyone wishing to understand the state-of-the-art and the future directions of this scientifically challenging and practically important field.
Large Eddy Simulation of Turbulent Combustion
Author: Dávid JeschMILD Combustion: Modelling Challenges, Experimental Configurations and Diagnostic Tools
Author: Alessandro ParentePublisher: Frontiers Media SA
ISBN: 2889717003
Category : Technology & Engineering
Languages : en
Pages : 160
Book Description
Large Eddy Simulation of the Lattice Boltzmann Equation for Turbulent Combustion
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 192
Book Description
The Lattice Boltzmann equation (LBE) was used to perform direct numerical simulations (DNS) and large-eddy simulations (LES) of benchmark problems in turbulence, scalar mixing, and reaction. The most important contribution was the development of LBE theory for binary mixing, which can be extended in a straight-forward manner to multi-scalar mixing. Computational simulations were performed to verify that the desired diffusive effects could be achieved in classical mixing problems. It was demonstrated that the shape of the probability density functions during binary mixing from non-premixed initial conditions was captured precisely. The technique for handling reactions in the LBE context also was demonstrated. In the standard one-dimensional flame propagation problem, the burning rate was captured accurately. The third significant contribution was the adaptation of the multi-time-scale relaxation technique to LES. Several DNS and LES calculations of benchmark turbulent flows (decaying isotropic and homogeneous shear, square jet) were performed to establish the effectiveness and efficiency of LBE. The decay exponent in decaying turbulence, the equilibrium anisotropies in homogeneous turbulence, and the spread rates in square jets were calculated accurately.
Large-eddy Simulation and Filtered Mass Density Function Approach to Non-equilibrium Turbulent Combustion Modeling
Author: Fabrizio BisettiSubfilter Scale Combustion Modelling for Large Eddy Simulation of Turbulent Premixed Flames
Author: Nasim ShahbazianLarge-Eddy Simulations of Turbulence
Author: M. LesieurPublisher: Cambridge University Press
ISBN: 9780521781244
Category : Mathematics
Languages : en
Pages : 240
Book Description
Large-Eddy Simulations of Turbulence is a reference for LES, direct numerical simulation and Reynolds-averaged Navier-Stokes simulation.
A General Purpose Large-eddy Simulation/probability Density Function Simulator on Block Structured Grids
Author: Hasret TürkeriPublisher:
ISBN:
Category : Air flow
Languages : en
Pages : 246
Book Description
Turbulent Reactive Flows
Author: R. BorghiPublisher: Springer Science & Business Media
ISBN: 146139631X
Category : Science
Languages : en
Pages : 958
Book Description
Turbulent reactive flows are of common occurrance in combustion engineering, chemical reactor technology and various types of engines producing power and thrust utilizing chemical and nuclear fuels. Pollutant formation and dispersion in the atmospheric environment and in rivers, lakes and ocean also involve interactions between turbulence, chemical reactivity and heat and mass transfer processes. Considerable advances have occurred over the past twenty years in the understanding, analysis, measurement, prediction and control of turbulent reactive flows. Two main contributors to such advances are improvements in instrumentation and spectacular growth in computation: hardware, sciences and skills and data processing software, each leading to developments in others. Turbulence presents several features that are situation-specific. Both for that reason and a number of others, it is yet difficult to visualize a so-called solution of the turbulence problem or even a generalized approach to the problem. It appears that recognition of patterns and structures in turbulent flow and their study based on considerations of stability, interactions, chaos and fractal character may be opening up an avenue of research that may be leading to a generalized approach to classification and analysis and, possibly, prediction of specific processes in the flowfield. Predictions for engineering use, on the other hand, can be foreseen for sometime to come to depend upon modeling of selected features of turbulence at various levels of sophistication dictated by perceived need and available capability.