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Record Search Query: [Personnel: Last_Name='STEVENS', Middle_Name='B.', First_Name='TYLER']

DRIFTSIM - Development of a User-Friendly Computer Program to Predict Drift Distances of Spray Droplets
Entry ID: USDA_ARS_DRIFTSIM
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Summary
Abstract: Computer simulation provides a means of determining the relative effects of various factors on spray drift while field experiments to measure spray drift have the limitation that many variables cannot be controlled. A Windows Version computer program (DRIFTSIM) was developed to rapidly estimate the mean drift distances of water droplets discharged from atomizers on field sprayers. This program interpolates values from a large data base of drift distances originally calculated for single droplets with a flow simulation program (FLUENT). The simulations of drift distances up to 200 m (656 ft) included temperatures (10-30 °C; 50-86°F), discharge heights (0-2.0 m; 0-6.56 ft), initial downward droplet velocities (0-50 m/s; 0-164 ft/s), relative humidity (10-100%), wind velocities (0-10.0 m/s; 0-32.8 ft/s), droplet sizes (10-2000 µm), droplet size distribution in Dv.1, Dv.5 and Dv.9, and 20% turbulence intensity. Variables can be either in metric or English units. For the input of droplet size distribution, drift distances are reported along with portion of volume in each class such as provided by many droplet size analyzers. The accuracy of the program FLUENT was verified with a uniform droplet generator and wind tunnel. The program indicates the relative effects of the input variables on drift distances and should, especially for large droplets, provide reasonable accuracy for many field applications.

[Summary provided by the USDA.]
Related URL
Link: GET SERVICE > GET SOFTWARE PACKAGE
Description: Download the DRIFTSIM model (registration required).

Link: VIEW RELATED INFORMATION
Description: A Windows Version of DRIFTSIM for Estimating Drift Distances of Droplets publication.
Service Citation
Originators: Zhu, H., Fox, R.D., Ozkan, H.E.
Title: DRIFTSIM - Development of a User-Friendly Computer Program to Predict Drift Distances of Spray Droplets
Release_Date: 2005
Provider: USDA Agricultural Research Service
URL: http://www.ars.usda.gov/Research/docs.htm?docid=11228
Service Keywords
MODELS >COMPONENT PROCESS MODELS   [Definition]
MODELS >ATMOSPHERIC CHEMISTRY MODELS   [Definition]
Science Keywords
AGRICULTURE >AGRICULTURAL CHEMICALS >PESTICIDES   [Definition]
ATMOSPHERE >ATMOSPHERIC TEMPERATURE >AIR TEMPERATURE   [Definition]
ATMOSPHERE >ATMOSPHERIC WATER VAPOR >HUMIDITY   [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >SURFACE WINDS   [Definition]
ATMOSPHERE >ATMOSPHERIC WINDS >TURBULENCE   [Definition]
ISO Topic Category
FARMING
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE
ECONOMY
Access Constraints
User registration is required before downloading.
Keywords
Models
Crops
Pesticides
Pesticide Dispersion
Spray Drift
Droplet Velocities
Service Provider
Agricultural Research Service, U. S. Department of Agriculture

Service Provider Personnel
Name: USDA-ARS
Phone: 254-770-6500
Fax: 254-770-6561
Contact Address:
USDA-ARS
Grassland Soil and Water Research Laboratory
808 E. Blackland Rd.
 City: Temple
Province or State: TX
Postal Code: 76502
Country: USA
Distribution Media
Distribution_Media: Online
Fees: No fees
Personnel
HEPING ZHU
Role: TECHNICAL CONTACT
Phone: 330-263-3871
Fax: 330-263-3953
Email: Heping.Zhu at ARS.USDA.GOV
Contact Address:
Room 208
1680 MADISON AVE
City: WOOSTER
Province or State: OH
Postal Code: 44691
Country: USA

TYLER B. STEVENS
Role: SERF AUTHOR
Phone: (301) 614-6898
Fax: 301-614-5268
Email: Tyler.B.Stevens at nasa.gov
Contact Address:
NASA Goddard Space Flight Center
Global Change Master Directory
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Creation and Review Dates
SERF Creation Date: 2012-04-30
SERF Last Revision Date: 2012-05-01
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