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Circular Far-Wake Flow behind a Sphere: Solutions to the Second Order
Publisher: American Society of Civil Engineers
Abstract: The theory of hydrodynamic phenomenon of the axisymmetric circular far-wake flow behind a sphere is revisited in this study by the generalized similarity solution of the governing momentum equations to obtain the solutions ...
Curvilinear Flow Profiles Based on Reynolds Averaging
Publisher: American Society of Civil Engineers
Abstract: A new theoretical approach is presented for the derivation of free surface profiles of two-dimensional steady and unsteady flows by solving the Reynolds-averaged Navier-Stokes equations applied to the turbulent flow regime. ...
Sediment Entrainment Probability and Threshold of Sediment Suspension: Exponential-Based Approach
Publisher: American Society of Civil Engineers
Abstract: This study examines the probability for sediment entrainment to bed load and the probability for the threshold condition of sediment to be in suspension. The theoretical analysis is based on a simple one-sided exponential ...
Gravity Waves on Turbulent Shear Flow: Reynolds Averaged Approach
Publisher: American Society of Civil Engineers
Abstract: Gravity waves propagating over free-surface flows with shallow depth are well-known phenomena. The small-amplitude sinusoidal wave and Korteweg-de Vries (KdV) equations are based on potential-flow theory being widely used ...
Instability Theory of Sand Ripples Formed by Turbulent Shear Flows
Publisher: American Society of Civil Engineers
Abstract: A theory of turbulent shear flow over a sand bed is developed, addressing the instability principle of the fluid-granular bed interface leading to the formation of ripples. The Reynolds-averaged Navier-Stokes (RANS) equations ...
Circular Far-Wake Flow behind a Sphere: Solutions to the Second Order
Publisher: American Society of Civil Engineers
Abstract: The theory of hydrodynamic phenomenon of the axisymmetric circular far-wake flow behind a sphere is revisited in this study by the generalized similarity solution of the governing momentum equations to obtain the solutions ...
H2 Energy Estimate of Boundary Controlled Vibrating Hybrid Structure Subject to Uncertain Forces
Publisher: American Society of Civil Engineers
Abstract: We study here a model hybrid system consisting of a flexible rectangular space structure such as a solar cell array, hoisted at one end by a movable rigid hub, set to vibration from certain initial conditions, but subject ...
Free Surface Profiles of Undular Hydraulic Jumps
Publisher: American Society of Civil Engineers
Abstract: An undular hydraulic jump on a smooth boundary occurs when the approaching flow Froude number marginally exceeds its critical value of unity. The free surface profiles of undular hydraulic jumps are studied theoretically ...
Clear Water Scour at Circular Piers: a Model
Publisher: American Society of Civil Engineers
Abstract: The three-dimensional quasi-steady vortex flow field around circular piers in a quasi-equilibrium scour hole under a clear water regime has been investigated experimentally. The main characteristic features of the flow, ...
Wall-Wake Flows Downstream of a Sphere Placed on a Plane Rough Wall
Publisher: American Society of Civil Engineers
Abstract: The time-averaged characteristics of turbulent wall-wake flows downstream of a sphere placed on a rough wall are studied. The profiles of the defect of streamwise velocity, Reynolds shear stress, and turbulence intensities ...
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