標(biāo)題: Titlebook: Direct and Large-Eddy Simulation IV; Bernard J. Geurts,Rainer Friedrich,Olivier Métais Book 2001 Springer Science+Business Media Dordrecht [打印本頁] 作者: Flippant 時(shí)間: 2025-3-21 17:51
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書目名稱Direct and Large-Eddy Simulation IV讀者反饋學(xué)科排名
作者: 廣大 時(shí)間: 2025-3-21 20:38 作者: Urgency 時(shí)間: 2025-3-22 01:25
Analysing Near-Wall Behaviour in a Separating Turbulent Boundary Layer by DNS,l scaling is no more valid in situations with strong pressure gradients. A new formulation including the instantaneous pressure gradient gives a considerable improvement of the prediction of the wall shear stress in backward flow events before separation, in the separation zone and after reattachmen作者: excrete 時(shí)間: 2025-3-22 05:40 作者: 個(gè)阿姨勾引你 時(shí)間: 2025-3-22 08:52 作者: 行為 時(shí)間: 2025-3-22 14:10
Springer Handbook of Mechanical Engineeringl scaling is no more valid in situations with strong pressure gradients. A new formulation including the instantaneous pressure gradient gives a considerable improvement of the prediction of the wall shear stress in backward flow events before separation, in the separation zone and after reattachmen作者: 行為 時(shí)間: 2025-3-22 18:02
Direct and Large-Eddy Simulation IV978-94-017-1263-7Series ISSN 1382-4309 Series E-ISSN 2215-1826 作者: COWER 時(shí)間: 2025-3-23 01:15
Springer Handbook of Materials DataWe describe numerical methods for DNS and LES of turbulent pipe flow including particles. The method is developed to study the possibility to describe the dispersion of particles by a Langevin equation for particle velocity. To this end the accurate prediction of space-time velocity correlation functions is important.作者: 火光在搖曳 時(shí)間: 2025-3-23 01:39
https://doi.org/10.1007/978-3-030-47035-7A dynamic subgrid-scale model using explicitly the turbulent kinetic energy, ., is investigated. The evolution for . is predicted by a transport equation. This subgrid-scale model is tested on LES of decaying homogeneous turbulence in a cubic geometry with periodic boundary conditions.作者: 印第安人 時(shí)間: 2025-3-23 09:21 作者: Cursory 時(shí)間: 2025-3-23 09:59 作者: exceed 時(shí)間: 2025-3-23 14:28 作者: BURSA 時(shí)間: 2025-3-23 21:57 作者: 死貓他燒焦 時(shí)間: 2025-3-24 00:32 作者: 不可思議 時(shí)間: 2025-3-24 06:26
Marine Enzymes – Production & Applicationsacross a turbulent wake flow generated by a heated cylinder. To obtain filtered and subgrid quantities at three different filter sizes the separation distance among probes in an array of four X-wire and four cold-wire probes is varied. We find that while the kinetic energy dissipation tensor approac作者: Delectable 時(shí)間: 2025-3-24 06:57 作者: Folklore 時(shí)間: 2025-3-24 13:57 作者: 脊椎動(dòng)物 時(shí)間: 2025-3-24 14:53
Wolfgang Buck,Steffen Rudtsch Dr.fferentiation and interpolation in the wall-parallel directions. The skew-symmetric form of the advection term ensures conservation of kinetic energy. Results for disturbance growth in Poiseuille flow and LES of turbulent channel flow indicate that the scheme is superior to the 6th-order . approxima作者: Incumbent 時(shí)間: 2025-3-24 20:37
Wolfgang Buck,Steffen Rudtsch Dr. provide a physically realistic model of unresolved, subgrid scales. In the procedure the large eddy simulation equations are advanced in time with the subgrid-scale stress tensor calculated from the parallel solution of the truncated Navier-Stokes equations on a mesh two times finer in each Cartesi作者: Perineum 時(shí)間: 2025-3-25 02:56 作者: audiologist 時(shí)間: 2025-3-25 04:22 作者: right-atrium 時(shí)間: 2025-3-25 08:14 作者: 未成熟 時(shí)間: 2025-3-25 11:53 作者: Wordlist 時(shí)間: 2025-3-25 17:11
Nondestructive Inspection (NDI) into large and incremental scales; the incremental scales have a larger (two times) spectral support than the large ones. Both velocity components are advanced in time by integrating their respective equations. At every time step and point in the wall normal direction, the one-dimensional energy sp作者: 最高點(diǎn) 時(shí)間: 2025-3-25 22:06
Springer Handbook of Mechanical Engineeringsuited. When considering such problems as pollutant emission, detailed models must of course be employed to describe the combustion and diffusion processes. Due to the huge cost of such simulations, they have been generally restricted to two-dimensional configurations up to now, leading to unsolved 作者: SYN 時(shí)間: 2025-3-26 04:06 作者: 范圍廣 時(shí)間: 2025-3-26 07:52
Precision Machinery Using MEMS Technologyels for chemistry and transport. A laminar flame calculation is first described to distinguish the different steps occurring during auto-ignition when the oxidizer is preheated. For two-dimensional turbulent cases, combustion starts with a partially-premixed reaction zone initiated away from the sto作者: 蚊帳 時(shí)間: 2025-3-26 08:49
Engineering Materials and Their Propertiesng complex chemistry. For this purpose, we have developed a DNS code based on the low-Mach number assumption and compared this code to an existing compressible DNS code. Both codes are used to simulate the interaction between a planar premixed H./O. flame and a turbulent field. A thorough post-proce作者: Benzodiazepines 時(shí)間: 2025-3-26 15:54
Springer Handbook of Mechanical Engineeringpseudo-spectral method: the derivatives in the transport equation for the scalar field are computed in Fourier Space. The periodic boundary condition in the streamwise direction is restored by means of a “fringe region”. Results are presented for two cases: A) a non-reactive scalar released from a l作者: 劇本 時(shí)間: 2025-3-26 19:49
Pressure Vessels and Heat Exchangerson. For both, transition capturing plays an important role. Even in the latter case with high Reynolds number this process has to be resolved to some extent in order to obtain a satisfactory result. Spanwise shear makes the flow around a cylinder highly complex through the resulting secondary flow. 作者: cajole 時(shí)間: 2025-3-26 21:23
Springer Handbook of Mechanical Engineeringindtunnel experiments. This configuration still constitutes a challenging test case for Reynolds Averaged Navier-Stokes (RANS) simulation and LES due to the complexity of the suction side boundary layer: an adverse pressure gradient creates successively a laminar separation bubble, a turbulent reatt作者: Vulvodynia 時(shí)間: 2025-3-27 02:20
1382-4309 AC workshops that originated at the University of Surrey in 1994. Over the years the DLES-series has grown into a major international venue focused on the development and application of direct and large-eddy simulation. Fundamental turbulence - and modeling issues but also elements from modem numeri作者: 哎呦 時(shí)間: 2025-3-27 09:04
Wolfgang Buck,Steffen Rudtsch Dr. Results for disturbance growth in Poiseuille flow and LES of turbulent channel flow indicate that the scheme is superior to the 6th-order . approximation proposed by Morinishi .. (1998). The extension to non-periodic boundary conditions is demonstrated for a spatially developing turbulent boundary layer.作者: 昏暗 時(shí)間: 2025-3-27 13:17
Surface and Interface Characterization(./..). for . > ... This resulting forcing induces a very rapid depletion of the energy cascade at wavenumbers . > ... Two-point statistics of a model implementation compare well with corresponding statistics obtained from direct numerical simulations.作者: constitute 時(shí)間: 2025-3-27 17:07 作者: 帳單 時(shí)間: 2025-3-27 21:08
Pressure Vessels and Heat Exchangersextent in order to obtain a satisfactory result. Spanwise shear makes the flow around a cylinder highly complex through the resulting secondary flow. Here, the competition between the spanwise coupling and the spanwise inhomogenity is investigated.作者: HEAVY 時(shí)間: 2025-3-27 23:04 作者: paradigm 時(shí)間: 2025-3-28 05:07
A Finite-Mode Spectral Model of Homogeneous and Isotropic Navier-Stokes Turbulence,(./..). for . > ... This resulting forcing induces a very rapid depletion of the energy cascade at wavenumbers . > ... Two-point statistics of a model implementation compare well with corresponding statistics obtained from direct numerical simulations.作者: 天然熱噴泉 時(shí)間: 2025-3-28 10:04
Numerical Simulation of Turbulent Reacting Flow,in the streamwise direction is restored by means of a “fringe region”. Results are presented for two cases: A) a non-reactive scalar released from a line source and B) two reactive scalars released from two different line sources.作者: 機(jī)械 時(shí)間: 2025-3-28 13:26
Transition in LES of Bluff Body Flows and Airfoils,extent in order to obtain a satisfactory result. Spanwise shear makes the flow around a cylinder highly complex through the resulting secondary flow. Here, the competition between the spanwise coupling and the spanwise inhomogenity is investigated.作者: miniature 時(shí)間: 2025-3-28 14:46
Wolfgang Buck,Steffen Rudtsch Dr.an direction than the mesh employed for a discretization of the resolved quantities. The truncated NavierStokes equations are solved through a sequence of runs, each initialized using the subgrid-scale estimation model. The modeling procedure is illustrated on the example of forced and decaying isotropic turbulence.作者: Fretful 時(shí)間: 2025-3-28 21:20 作者: 串通 時(shí)間: 2025-3-28 23:57 作者: incredulity 時(shí)間: 2025-3-29 04:01
Large Eddy Simulations Using the Subgrid-Scale Estimation Model and Truncated Navier-Stokes Dynamican direction than the mesh employed for a discretization of the resolved quantities. The truncated NavierStokes equations are solved through a sequence of runs, each initialized using the subgrid-scale estimation model. The modeling procedure is illustrated on the example of forced and decaying isotropic turbulence.作者: Lacerate 時(shí)間: 2025-3-29 11:12 作者: 潛移默化 時(shí)間: 2025-3-29 14:34
Large Eddy Simulation of Flow Around a High Lift Airfoil,achment and a separation near the trailing edge. To handle this high Reynolds number flow with LES on available supercomputers, a local mesh refinement technology and a low dissipative scheme are developed. It appears that the computed mean and fluctuating velocity profiles compare reasonably well with experimental measurements.作者: adumbrate 時(shí)間: 2025-3-29 18:52 作者: vitreous-humor 時(shí)間: 2025-3-29 20:26 作者: floaters 時(shí)間: 2025-3-30 01:08
Precision Machinery Using MEMS Technologyulent flame speed with increasing turbulent intensity at the position of the flame front, which is in good agreement with experimental and theoretical data. The turbulent flame speed also shows a dependence of the expansion coefficient and increases with higher expansion rates.作者: Obstruction 時(shí)間: 2025-3-30 06:16 作者: FEAT 時(shí)間: 2025-3-30 11:42
Assessment of Some Models for LES without/with Explicit Filtering,er with some models. Of particular interest are models that behave as viscosity at low . and higher order viscosity at high .. The spectral behavior of the models is investigated numerically, in 48. LES of decaying isotropic turbulence (started from 256. DNS). Two diagnostics are used: model dissipation spectrum and obtained energy spectrum.作者: HALL 時(shí)間: 2025-3-30 15:26 作者: 墻壁 時(shí)間: 2025-3-30 20:29 作者: Nomadic 時(shí)間: 2025-3-30 21:05
Springer Handbook of Materials Dataed on the channel width and the mean bulk velocity) by comparing the results to those of physical experiments and previous numerical studies. This comparison shows that with a fourth-order, symmetry-preserving method a 64 × 64 × 32 grid suffices to perform an accurate direct numerical simulation.作者: pantomime 時(shí)間: 2025-3-31 01:08 作者: Itinerant 時(shí)間: 2025-3-31 05:38
Nondestructive Inspection (NDI)o different Reynolds numbers are conducted. Results for both simulations are in good agreement with filtered DNS data. A significant improvement is shown compared to simulations with no model at the same low resolutions as the LES. The computational cost of the incremental method is similar to that of a Galerkin approximation on the same grid.作者: 受傷 時(shí)間: 2025-3-31 11:44 作者: CERE 時(shí)間: 2025-3-31 16:39
Precision Machinery Using MEMS Technologyoichiometric point, and at the same time, a partially-premixed front propagates along isomixture fraction lines. In two dimensions, this flame growth leads to local edge-flame combustion. The particular role of partially-premixed combustion during this complex ignition process is evidenced from the DNS results作者: licence 時(shí)間: 2025-3-31 18:49 作者: vertebrate 時(shí)間: 2025-3-31 23:57
DNS of Turbulent Supersonic Channel Flow,fects of compressibility are analysed based on the Reynolds stress budgets and comparisons with their incompressible counterparts. DNS data of turbulent supersonic channel flow along permeable walls at . 1.5 and . 3000 are used to analyze in which way wall permeability modifies the turbulence structure of the flow.作者: bioavailability 時(shí)間: 2025-4-1 03:04
A Model Based on Incremental Scales Applied to LES of Turbulent Channel Flow,o different Reynolds numbers are conducted. Results for both simulations are in good agreement with filtered DNS data. A significant improvement is shown compared to simulations with no model at the same low resolutions as the LES. The computational cost of the incremental method is similar to that of a Galerkin approximation on the same grid.作者: 機(jī)制 時(shí)間: 2025-4-1 08:49 作者: famine 時(shí)間: 2025-4-1 10:25
Partially-Premixed Combustion during Autoignition of a Turbulent Nonpremixed Flame,oichiometric point, and at the same time, a partially-premixed front propagates along isomixture fraction lines. In two dimensions, this flame growth leads to local edge-flame combustion. The particular role of partially-premixed combustion during this complex ignition process is evidenced from the DNS results作者: Derogate 時(shí)間: 2025-4-1 16:01 作者: 偏離 時(shí)間: 2025-4-1 20:36
On the Accuracy of Symmetry-Preserving Discretization, differential operators, i.e. the convective operator is represented by a skew-symmetric matrix and the diffusive operator is approximated by a symmetric, positive-definite matrix. Such a symmetry-preserving discretization of the Navier-Stokes equations is stable on any grid, and conserves the total作者: inflame 時(shí)間: 2025-4-1 23:02
DNS of Turbulent Supersonic Channel Flow, velocity — entropy form of the compressible Navier — Stokes equations is integrated using a fifth order compact upwind scheme for the Euler part, a fourth order Padé scheme for the viscous terms and a third — order low — storage Runge — Kutta time integration method. The work aims at increasing the
