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Title: Analysis of evaporation data under roughness-induced wind flow
Authors: Ojha C.S.P.
Kumar M.
Saini J.S.
Published in: Journal of Hydrologic Engineering
Abstract: Roughness-induced wind flow is commonly encountered around water bodies. It is well known that wind velocity enhances evaporation. However, the way this enhancement takes place in roughness-induced flow has been less explored. In this paper, a set of 200 data of an experimental investigation of the evaporation rates of water under forced convection conditions created by roughness elements from a circular pan fitted in the bottom wall of a wind tunnel test section are analyzed. The range of parameters used in this work are as follows: pan water temperature 30-50°C, wind velocity 4.68-17.52 m=s, and relative roughness height 0.011-0.075. Evaporation rates are related as a function of the vapor pressure differential, wind velocity, and relative roughness height of the obstructions introduced in the upstream of the air flow. It is found that evaporation rates are a nonlinear function of the relative roughness height, and evaporation estimates can contain a large error if such roughness-induced effects are neglected. © 2013 American Society of Civil Engineers.
Citation: Journal of Hydrologic Engineering(2013), 18(6): 665-674
Issue Date: 2013
Publisher: American Society of Civil Engineers (ASCE)
Keywords: Evaporation rates
Partial pressure differential
Relative humidity
ISSN: 10840699
Author Scopus IDs: 7004206177
Author Affiliations: Ojha, C.S.P., Dept. of Civil Engineering, Indian Institute of Technology, Roorkee-247667, India, School of Civil Engineering, Purdue Univ., West Lafayette, IN, 47907, United States
Kumar, M., Dept. of Mechanical Engineering, Dehradun Institute of Technology, Dehradun-248001, India
Saini, J.S., Dept. of Mechanical and Industrial Engineering, Indian Institute of Technology, Roorkee-247667, India
Corresponding Author: Kumar, M.; Dept. of Mechanical Engineering, Dehradun Institute of Technology, Dehradun-248001, India; email:
Appears in Collections:Journal Publications [CE]

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