Natural Convection Driven Evaporation from a water surface

Kumar, Navneet and Arakeri, Jaywant H (2015) Natural Convection Driven Evaporation from a water surface. In: IUTAM Symposium on Multiphase Flows with Phase Change Challenges and Opportunities, DEC 08-11, 2014, Indian Inst Technol, Hyderabad, INDIA, pp. 108-115.

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Abstract

We measure evaporation rates from water kept in an insulated tank and which is at a temperature higher than the ambient. Different schemes are used to obtain different temperature profiles in the water layer: a) water is heated from bellow, b) water left to cool after being heated, c) water heated from above with an IR heater, d) water heated from above in a very shallow tank. The idea of having these different schemes is to check the role of water side convection on evaporation rates. In cases a) and b) unstable stratification causes convection; in case c) we have stable stratification, and in case d), the temperature is uniform in the water layer. The heating-from-above experiments simulate some aspects of evaporation from natural bodies, like lakes, due to solar radiation. Evaporation rates were measured using a precision balance. Temperatures were measured in the water and in the ambient, and a thermal camera was used to monitor the water surface temperature and visualize the convection patterns. We present results of evaporation rates under the different conditions. (C) 2015 Published by Elsevier B.V.

Item Type:	Conference Proceedings
Series.:	Procedia IUTAM
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	24 Aug 2016 09:46
Last Modified:	24 Aug 2016 09:46
URI:	http://eprints.iisc.ac.in/id/eprint/54569

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