Environmental Fluid Mechanics
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Effects of a sharp change of emergent vegetation distributions on thermally driven flow over a slope
Environmental Fluid Mechanics - Tập 15 - Trang 771-791 - 2014
In this study, thermally driven flow within a sharp change of rooted emergent vegetation distributions is discussed. A conceptual and linear model is developed to study the interferences and competitions between two forcing mechanisms (vegetation shading and sloping bottom effects) on circulation patterns. The two forcing mechanisms can counteract or reinforce each other according to the presence ......
Buoyancy-Driven Two-Layer Exchange Flows Across a Slowly Submerging Barrier
Environmental Fluid Mechanics - Tập 6 - Trang 133-151 - 2006
Results are presented from a combined analytical and laboratory study of unsteady, two-layer, density-driven, sub-maximal exchange over a slowly-descending estuarine barrier located very close to the junction of the river mouth and the near-shore coastal zone. As in the precursor study (Cuthbertson et al. 2004, Environ. Fluid Mech. 4, 127–155) that the present investigation extends, the rate of de......
Tối ưu hóa thiết kế cấu trúc trong dòng chảy dựa trên mô phỏng: Các ván đá Dịch bởi AI
Environmental Fluid Mechanics - - 2018
Chúng tôi áp dụng mô hình động lực học thủy lực kết hợp ba chiều, Mô phỏng Dòng chảy Ảo (VFS-Geophysics) ở chế độ Navier–Stokes trung bình Reynolds không ổn định, đóng với mô hình $$k-\omega$$ để mô phỏng dòng chảy hỗn loạn và vận chuyển sediment trong các dòng nước có đáy cát và sỏi quy mô lớn dưới các điều kiện mô hình và đáy sống. Kết quả mô phỏng được sử dụng để thực hiện các thí nghiệm số hệ ......
#mô phỏng dòng chảy #cấu trúc trong dòng chảy #ván đá #vận chuyển sediment #mô hình thủy động lực học
Effect of atmospheric boundary layer stability on the inclination angle of turbulence coherent structures
Environmental Fluid Mechanics - Tập 18 - Trang 637-659 - 2017
Coherent structures in the atmospheric boundary layer are fundamental to the transport of momentum and heat as well as to the production of turbulence. The present work attempts to investigate the behavior of the inclination angle of the vortex packet structures (
$$\gamma$$
......
Experimental study on growth and spread of dispersed particle-laden plume in a linearly stratified environment
Environmental Fluid Mechanics - Tập 15 - Trang 1241-1262 - 2015
We present results of laboratory experiments conducted to study the evolution, growth, and spreading rate of a dispersed particle-laden plume produced by a constant inflow into a density varying environment. Particles having mean size,
$$d_p=100\ \upmu $$
......
Modeling ice cover effect on river channel bank stability
Environmental Fluid Mechanics - Tập 22 - Trang 1121-1133 - 2022
This paper presents a numerical model study on the ice cover effect on bank stability in non-cohesive alluvial channels. The model consists of a coupled two-dimensional finite element unsteady hydrodynamic model with bank erosion and mass failure processes for open water and ice-covered conditions. The associated morphological change is modeled with non-equilibrium sediment transport, including th......
Comments on “Development of an empirical equation for the transverse dispersion coefficient in natural streams” by Tae Myoung Jeon, Kyong Oh Baek and Il Won Seo
Environmental Fluid Mechanics - Tập 8 - Trang 97-100 - 2007
In a recent paper published in this journal, Jeon et al. ((2007), Environ Fluid Mech 7(4): 317–329) have presented a new empirical equation for the transverse dispersion coefficient in natural streams that was developed based on the hydraulic and geometric parameters using a regression technique. A total of 32 data sets collected in 32 streams was used. Among them, 16 data sets were used for deriv......
A mathematical model and mesh-free numerical method for contact-line motion in lubrication theory
Environmental Fluid Mechanics - Tập 22 - Trang 301-336 - 2022
We introduce a mathematical model with a mesh-free numerical method to describe contact-line motion in lubrication theory. We show how the model resolves the singularity at the contact line, and generates smooth profiles for an evolving, spreading droplet. The model describes well the physics of droplet spreading–including Tanner’s Law for the evolution of the contact line. The model can be config......
Urban Fluid Mechanics: Air Circulation and Contaminant Dispersion in Cities
Environmental Fluid Mechanics - Tập 1 - Trang 107-164 - 2001
Recently, many urban areas of the world have experienced rapid growth of population and industrial activity raising concerns of environmental deterioration. To meet challenges associated with such rapid urbanization, it has become necessary to implement wise strategies for environmental management and planning, addressing the exclusive demands of urban zones for maintaining environmental sustainab......
A Modelling Study of Transient, Buoyancy-Driven Exchange Flow over a Descending Barrier
Environmental Fluid Mechanics - Tập 4 - Trang 127-155 - 2004
Results are presented from a series of model studies of the transient exchange flow resulting from the steady descent of an impermeable barrier separating initially-quiescent fresh and saline water bodies having density ρ0 and ρ0+(Δρ)0, respectively. A set of parametric laboratory experiments has been carried out (i) to determine the characteristic features of the time-dependent exchange flow over......
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