Heat transfer characteristics in mist cooling with commercial machining oil were investigated experimentally. Steady state experiments of heat transfer were conducted using a pure copper cylinder and mist flow of commercial machining oil and air. Liquid flow rate was 0.3, 0.9, 1.8, 4 and 8 l/hr, respectively; each air flow rate was 0, 40, 75 and 120 lN/min. Furthermore, liquid mass flux on the heating surface for each experimental condition was measured by using a measuring cylinder with same diameter as the heater. Average velocity of droplets and average diameter of those were measured by using a laser doppler anemometer and immersion method, respectively. The heat transfer mechanism in oil mist was only cooling of liquid film formed on a heated surface, whereas the heat transfer mechanism in water mist cooling was classified into three regions. The heat transfer coefficient in the oil mist was well expressed by the heat removal capacity on sensible heat of supplying oil-droplets to the heated surface. Four dimensionless correlations were derived from a dimension analysis, Buckingham Pi theorem, and experimental data for both water mist and the oil mist.

Yokogawa, M., 2000, “Study on Eco-friendly Cold-air Blast Turning Method,” the 9th Int. Machine Tool Engineers Conf., pp. 60–61.
Ohtake, H., Teruya, Y. and Koizumi, Y., 2002, “Study on Boiling Heat Transfer in Mist Cooling (The Characteristics of Heat Transfer and Droplets in Mist Dispersed Flow),” Proc. 2002 ASME Int. Mech. Eng. Cong. Expo., IMECE2002-34552, CD-ROM-1, pp. 1–5.
Ohtake, H. and Koizumi, Y., 2003, “Study on Boiling Heat Transfer and Critical Heat Flux in Mist Cooling (Effect of Air Flow Rate on Heat Transfer and Behavior of Liquid on Heating Surface),” Proc. 2003 ASME Int. Mech. Eng. Cong. Expo., IMECE2003-41604, CD-ROM-1, pp. 1–5.
Ohtake, H. and Koizumi, Y., 2004, “Study on Boiling Heat Transfer and Critical Heat Flux in Mist Cooling (Effect of DROPLET SIZE ON Heat Transfer CHARACTERISTICS),” Proc. 2004 ASME Int. Mech. Eng. Cong. RD&D Expo., IMECE2004-61840, CD-ROM-1, pp. 1–8.
W. M.
, “
A Method of Correlating Heat-Transfer Data for Surface Boiling of Liquids
Trans. ASME, J. Heat Transf.
, pp.
JSME, 1989, “Boiling Heat Transfer and Cooling,” p. 226, Nihon Kogyo Shuppan.
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