Flow Parameters of Fluid Mud

by Giselher Gust, Univ of South Florida, Dep of Marine, Science, St. Petersburg, FL, USA,



Document Type: Proceeding Paper

Part of: Water for Resource Development

Abstract:

A set of small-scale, high-resolution velocity and stress sensors based on rugged metal-clad hot wires and epoxy-encapsulated hot films is to be evaluated for its performance characteristics in fluid muds. The first, and most basic experiments performed with them in laboratory/flume environments will identify the effects of sediment concentration of 'model fluid muds' on the flow profiles. The flow-related key questions addressed will be: (1) Does the Reynolds number similarity hold for fluid muds? (2) Does the pressure head (the drag law) of fluid-mud pipe flow suggest drag reduction or drag increase? (3) In a two-layer experiment in a laboratory flume with turbulent seawater flowing over a layer of fluid mud, what friction factor can be measured across the seawater-mud interface with Reynolds stress sensors, which stress/strain relationship develops in the mud layer, and what value does the bottom stress (skin friction) attain between the mud and the impermeable, smooth flume bottom.

Subject Headings: Fluid flow | Mud | Flumes | Flow measurement | Drag (fluid dynamics) | Sediment transport | Reynolds stress

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