Coanda-Effect Screen Research

Software

• Coanda-Effect Screen Analysis Software - A Windows-based program for analysis and design of Coanda-effect screens.  Version 0.47 was posted on November 30, 2007. This program is a 32-bit application for Windows 95 and later systems. This version fixes a bug that affected the velocity profile output from flat screens described in metric units.

Publications

• Design Guidance for Coanda-Effect Screens (2003) - Reclamation Research Report R-03-03.  This report applies the Coanda computer program to develop design guidance recommendations for a variety of screen configurations.  Case studies of actual screen installations are provided.
• Hydraulic Performance of Coanda-Effect Screens (2001) - This paper presents the complete numerical model for determining the discharge through a Coanda-effect screen structure. For a given inflow rate, the model computes the flow profile along the length of the screen and the total discharge through the screen as a function of the structure dimensions (e.g., drop height, screen length, screen arc radius, etc.) and the screen material properties. The paper also presents a refined model for predicting the discharge characteristics of tilted-wire screen materials as a function of the tilt angle, wire size, slot size, and the Froude number, Reynolds number and Weber number of the flow over the screen.
• Laboratory Testing and Numerical Modeling of Coanda-Effect Screens (2000) - This paper describes the mechanics of flow over and through Coanda-effect screens and presents a numerical model for predicting screen performance. The paper also presents a model for evaluating the discharge coefficients of tilted-wire screens and shows that the discharge coefficient is a unique function of the Froude number and the screen geometry.
• Hydraulic Testing of Static Self-Cleaning Inclined Screens (1995) - This paper reports results of the first series of laboratory tests conducted by Reclamation.