DEVELOPMENT OF DESIGN CRITERIA FOR ROOF WASHDOWN SYSTEMS: A STUDY OF THE RELATIONSHIP OF SLOPE TO PARTICLE TRANSPORT BY WATER FILMS

Abstract

This is the sixth report on a series of tests designed to study the basic principles involved in transport of particulate matter by water films. The previous reports covered the transport of particulate matter by various water flow rates on an ideal surface at one of five slopes from 0 to 0.165. This report covers the relationship of slope to transport on an ideal surface. On a near-horizontal surface, no transport occurs when the water flow rate is insufficient to produce turbulent flow. The slightest slope causes particles to be transported at low water flow rates in laminar flow. Surface waves, which are present at all slopes under most flow conditions, increase transport rate. An empirical equation is presented for the computation of the transport velocities of both spherical and irregular shaped particles. The maximum amount of particulate matter that can be transported is presented.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jun 04, 1964
Accession Number
AD0464189

Entities

People

  • Noah J. Vella
  • Raymond H. Heiskell
  • Robert J. Crew

Organizations

  • Naval Radiological Defense Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Counter WMD
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Civil Defense
  • Civil Engineering
  • Contracts
  • Detonations
  • Flow Rate
  • Laminar Flow
  • Materials
  • Measurement
  • Particles
  • Particulate Matter
  • Particulates
  • Ships
  • Surface Waves
  • Turbulent Flow
  • Water Flow
  • Waves

Readers

  • Coastal Oceanography
  • Combustion and Flow Dynamics.
  • Wave Propagation and Nonlinear Chaotic Dynamics.