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Communications on Hydraulic and Geotechnical Engineering: An Entrainment Model for Fluid Mud
Fluid mud is a highly concentrated near-bed suspension of mud, either mobile or stationary. It is generated by liquefaction of muddy beds by waves, or during rapid deposition, when the deposition rate exceeds the consolidation rate. Fluid mud is commonly observed in many estuaries, navigational channels, harbor basins and along some coasts. In this report an entrainment model for fluid mud is derived also using the TKE equation. Integrating this equation across the mixed layer yields an integral entrainment model that is similar to models to mixed-layer deepening in lakes and reservoirs. Two basically different flow conditions are considered, because situations in laboratory experiments and in the field often differ. In the laboratory, entrainment experiments are easily carried out in an annular flume, in which a flow in the water layer is driven by a screen exerting a shear stress at the water surface. The fluid-mud layer remains at rest (case 1). In case 2 turbulence is produced primarily in the fluid-mud layer because of the shear stress occurring at the base of this layer (for simplicity the bottom supporting the fluid-mud layer is assumed to be fixed and horizontal).
Communications on Hydraulic and Geotechnical Engineering: An Entrainment Model for Fluid Mud
Fluid mud is a highly concentrated near-bed suspension of mud, either mobile or stationary. It is generated by liquefaction of muddy beds by waves, or during rapid deposition, when the deposition rate exceeds the consolidation rate. Fluid mud is commonly observed in many estuaries, navigational channels, harbor basins and along some coasts. In this report an entrainment model for fluid mud is derived also using the TKE equation. Integrating this equation across the mixed layer yields an integral entrainment model that is similar to models to mixed-layer deepening in lakes and reservoirs. Two basically different flow conditions are considered, because situations in laboratory experiments and in the field often differ. In the laboratory, entrainment experiments are easily carried out in an annular flume, in which a flow in the water layer is driven by a screen exerting a shear stress at the water surface. The fluid-mud layer remains at rest (case 1). In case 2 turbulence is produced primarily in the fluid-mud layer because of the shear stress occurring at the base of this layer (for simplicity the bottom supporting the fluid-mud layer is assumed to be fixed and horizontal).
Communications on Hydraulic and Geotechnical Engineering: An Entrainment Model for Fluid Mud
C. Kranenburg (author)
1994
29 pages
Report
No indication
English
Physical & Chemical Oceanography , Dynamic Oceanography , Geotechnical engineering , Hydraulic engineering , Mathematical models , Mudflows , Entrainment , Mud-water interfaces , Turbulent flow , Kinetic energy , Suspended sediments , Estuaries , Harbors , Coastal waters , Channel morphology , Empirical equations , Foreign technology , Fluid mud , Entrainment models
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