A new method of producing local enhancement of buoyancy in liquid flows
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We describe here a novel method of generating large volumetric heating in a liquid. The method uses the principle of ohmic heating of the liquid, rendered electrically conducting by suitable additives if necessary. Electrolysis is prevented by the use of high frequency alternating voltage and chemically treated electrodes. The technique is demonstrated by producing substantial heating in an initially neutral jet of water. Simple flow visualisation studies, made by adding dye to the jet, show marked changes in the growth and development of the jet with heat addition.
KeywordsLiquid Flow Marked Change Flow Visualisation Heat Addition Ohmic Heating
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- Shlien, D. J. 1977: Method for heat injection into a liquid. Rev. Sci. Instrum. 48, 1152–1153Google Scholar
- Townsend, A. A. 1976: The structure of turbulent shear flows, 2nd ed. Cambridge/UK: Cambridge University PressGoogle Scholar
- Turner, J. S. 1963: Model experiments relating to thermals with increasing buoyancy. Q J. Meteorol. Soc. 89, 62–74Google Scholar
- Turner, J. S. 1973: Buoyancy effects in fluids. Cambridge/UK: Cambridge University PressGoogle Scholar
- Viswanath, P. R.; Narasimha, R.; Prabhu, A. 1978: Visualisation of relaminarising flows. J. Indian Inst. Sci. Sect. 60, 159–165Google Scholar