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近期, J. Fluid Mech.刊登了中科院力学所杨子轩研究团队在槽道湍流壁面压力方面的研究进展,论文题目为《槽道湍流中壁面压力的时空能谱》(On the wavenumber-frequency spectrum of the wall pressure fluctuations in turbulent channel flow)。
The nature of vorticity transport in three-dimensional turbulent flow is investigated using data from a direct numerical simulation of channel flow. An extension of Taylor's (1932) vorticity transport...
Direct numerical simulations of scalar fields produced by uniform and line sources in channel flow are used as the basis for examining the accuracy of random flight and closure models in predicting tu...
A grid-free scheme for solving quasi-one-dimensional, isentropic, compressible flow in the subsonic regime is developed with a view toward its eventual generalization to three-dimensional turbulent co...
Recent results are presented from the application of a grid-free vortex method to the prediction of turbulent aerodynamic flows produced by road vehicles. The approach has the character of a large edd...
Large-scale computations of dynamically interacting vortex tubes forming filaments are performed with a view toward investigating their relationship to turbulent fluid flow. It is shown that the stati...
The spatially developing, unforced, turbulent mixing layer is simulated via a grid-free vortex method. Vortex filaments composed of straight tubes are used as the computational element with new vortex...
A high resolution grid-free vortex filament scheme is applied to the prediction and simulation of coflowing round jets with a view to acquiring a new perspective on their physics and establishing the ...
A hybrid vortex fi lament scheme with the capability of simulating bounded turbulent fl ows is described. Viscous generation of new vortex elements at solid surfaces is accomplished through the interm...
The hairpin vortex illusion     hairpin  vortex illusion       2016/5/18
It has long been customary to assume that vortical structures in turbulent flows are synonymous with regions of rotational motion. Mathematical implementations of this idea using numerical and experim...
The dynamics of transitional and turbulent boundary layers is explored via a hybrid vortex filament/finite volume simulation scheme in which vortical structures are identified without the constraints ...
The unstructured-grid SUNTANS model is applied to San Francisco Bay using a grid with an average resolution of 50 m. This accurately resolves tidal hydrodynamics in a domain that extends from the Paci...
Seagrass blade dynamics were explored through numerical and laboratory experiments in order to improve parameterization of wave attenuation by submerged aquatic vegetation in the presence of a backgro...
介绍了上海大学上海市应用数学和力学研究所湍流与环境流体力学实验室分层湍流实验平台的建设,以及基于此科研平台进行的LIF(laser-induced fluorescence)流动显示、PIV(particle image velocimetry)流场测量和PDA(particle dynamic analyzer)单点测量等教学实验结果,最后对此平台在研究生创新实践教学过程中的应用过程进行了介绍。...
采用大涡模型结合气液两相流时均方程,对六直叶圆盘涡轮搅拌槽内的流场特性进行了数值模拟。自由水面的捕捉用VOF(Volume of Fluid)法,用Simplec方法求解控制方程。通过模拟得到了搅拌槽内复杂的双涡旋流场结构、转轮叶端尾涡的发展变化情况以及轴向流速的分布规律。通过对比大涡模拟与RNGκ-ε的计算结果,得知大涡模型能模拟出流场内瞬时旋涡的发展变化过程,反映出挡板的存在破坏了圆形搅拌槽的...

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