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RISFlow and Turbulence Structure around Abutments with Sloped Sidewalls
Publisher: American Society of Civil Engineers
Abstract: Results of eddy-resolving numerical simulations are used to investigate flow and turbulence structure around an isolated abutment with sloped sidewalls at conditions corresponding to the start (flatbed) and the end ...
Assessment of Predictive Capabilities of Detached Eddy Simulation to Simulate Flow and Mass Transport Past Open Cavities
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The three-dimensional (3D) incompressible flow past an open cavity in a channel is predicted using the Spalart–Almaras (SA) and the shear-stress-transport model (SST) based versions of detached ...
Flow-Field Complexity and Design Estimation of Pier-Scour Depth: Sixty Years since Laursen and Toch
Publisher: American Society of Civil Engineers
Abstract: This paper, written to celebrate the 60th anniversary of the Journal of Hydraulic Engineering, presents a structured, contemporary approach to scour-depth estimation that matches design method practicality to pier flow-field ...
Purging of a Neutrally Buoyant or a Dense Miscible Contaminant from a Rectangular Cavity. I: Case of an Incoming Laminar Boundary Layer
Publisher: American Society of Civil Engineers
Abstract: The flow past two-dimensional (2D) channel cavities along with the removal of neutrally buoyant or dense miscible contaminants introduced instantaneously inside the cavity are studied using eddy resolving techniques. In ...
Purging of a Neutrally Buoyant or a Dense Miscible Contaminant from a Rectangular Cavity. II: Case of an Incoming Fully Turbulent Overflow
Publisher: American Society of Civil Engineers
Abstract: Fully three-dimensional (3D) large-eddy simulation calculations of the flow past two-dimensional cavities for the case in which the incoming flow is fully turbulent are conducted to study the purging of neutrally buoyant ...
Implementation of a Hydraulic Routing Model for Dendritic Networks with Offline Coupling to a Distributed Hydrological Model
Publisher: American Society of Civil Engineers
Abstract: The authors present a new set of tools for solving the one-dimensional Saint-Venant equations (1D-SVEs) of flow transport throughout dendritic river networks. The numerical solver is integrated with a set of geoprocessing ...
Flow Heterogeneity over 3D Cluster Microform: Laboratory and Numerical Investigation
Publisher: American Society of Civil Engineers
Abstract: The present study examines the flow around a self-occurring cluster bed form and the use of general computation fluid dynamics methods for hydraulic and geophysical flow applications. This is accomplished through a ...
Numerical Investigation of Flow Hydrodynamics in a Channel with a Series of Groynes
Publisher: American Society of Civil Engineers
Abstract: The flow hydrodynamics in a straight open channel containing a multiple-embayment groyne field on one of its sides is investigated numerically using large eddy simulation. The vertical groynes are fully emerged. The mean ...
2D Large-Eddy Simulation of Lock-Exchange Gravity Current Flows at High Grashof Numbers
Publisher: American Society of Civil Engineers
Abstract: Lock-exchange gravity current flows produced by the instantaneous release of a heavy fluid are investigated by means of high-resolution two-dimensional (2D) large-eddy simulation (LES) using a dynamic subgrid scale model ...
Influence of Channel Aspect Ratio and Curvature on Flow, Secondary Circulation, and Bed Shear Stress in a Rectangular Channel Bend
Publisher: American Society of Civil Engineers
Abstract: Flow within an alluvial channel bend is significantly affected by channel geometry, including curvature ratio (bend radius/channel width,