A5083331514- Fluid Dynamics and Turbulent Flows
- Wind and Air Flow Studies
- Plant Water Relations and Carbon Dynamics
- Particle Dynamics in Fluid Flows
- Advanced Combustion Engine Technologies
- Computational Fluid Dynamics and Aerodynamics
- Computational Drug Discovery Methods
- Topological and Geometric Data Analysis
- Aerodynamics and Acoustics in Jet Flows
- Graph theory and applications
- Hydrology and Sediment Transport Processes
- Meteorological Phenomena and Simulations
- Combustion and flame dynamics
- Heat Transfer Mechanisms
Tsinghua University
2020-2023
Abstract
The migration trajectories of spanwise vortex structures were investigated to reveal their variation patterns and distribution characteristics, explicitly focusing on correlation with the characteristic quantities uniform momentum zones (UMZs). This approach is crucial for deepening understanding wall turbulence. Using a three-camera array particle image velocimetry experiment, dataset stream-normal flow field was acquired over region extending 8δ. space-time cross algorithm then employed...
This study numerically investigates the Mach number influence on stability limits of stationary curved premixed flames. The numerical is conducted over a range realistic numbers and varying channel widths. results reveal that flame velocity increases with number, consistent prior studies. Notably, identifies two critical widths: (i) Dc, at which Darrieus–Landau instability first occurs, (ii) Dw, beyond surpasses theoretical predictions based weakly nonlinear analyses grows monotonically...
Direct numerical simulations (DNSs) are performed to investigate the roughness effects on statistical properties and large-scale coherent structures in turbulent channel flow over three-dimensional sinusoidal rough walls. The outer-layer similarities of mean streamwise velocity Reynolds stresses examined by systematically varying number $k^{+}$ ratio height half-channel $k / \delta$ . energy transfer mechanism motions presence elements with different sizes is explored through spectral...
In this Letter, we propose a roughness scaling method based on the direct numerical simulation of turbulent channel flow over three-dimensional sinusoidal rough walls in transitionally regime. A new coupling scale Reτ/(k¯+S)n is defined by combining Reynolds number Reτ and parameter k¯+S, where k¯+ mean height, S steepness, n exponent—which depends type. The relationships between Reτ, function, friction factor, peak streamwise velocity fluctuation are explored. This approach provides an...
The wall-attached structures of scalar fluctuations over a traveling wavy boundary are investigated using large eddy simulations (LESs) at moderate Reynolds number (Reτ≈1000) and various Prandtl numbers (Pr=0.2, 0.7, 1, 2). wave slope is ak=0.1, where the amplitude k wavenumber. prescribed age c/u*=2, c phase speed u* friction velocity. For comparison, results an LES smooth wall also discussed. provide evidence for presence self-similar in both turbulent flow that wall. In particular,...
Porous material such as metal‐natural constructions and their particular partner poly‐hydra are made up of inorganic clusters with no saturation exhibit great capability for utilization in the absorption gas ascending opening optics detecting biotechnology hardware. Cuboctahedral bi‐metallic structure is an often‐quoted example polyhedra class. In this study, we have calculated first second Zagreb index, augmented inverse Randic, well general Randic symmetric division, harmonic index. We...