کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
661525 1458176 2006 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The thermal characteristics of a hot wire in a near-wall flow
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
The thermal characteristics of a hot wire in a near-wall flow
چکیده انگلیسی

A two-dimensional numerical study is carried out to obtain the correction curve for the near-wall measurements by an infinitely long hot wire having been calibrated under free stream condition for the two extreme cases of isothermal and adiabatic wall conditions. Unlike previous studies particularly in experiments where the correction curve is primarily based on only the distance (h  ) between the wall and the wire expressed in wall units (Y+≡hUτν), it is found that a second dimensionless parameter h0 (≡h/D) accounting for the effect of the hot wire diameter (D) is necessary to describe fully the overall near-wall correction curve. Our calculations also reveal a possible reason for the apparent discrepancy between the near-wall hot wire correction curves of Chew and Shi [Y.T. Chew, S.X. Shi, Wall proximity influence on hot-wire measurements, In: R.M.C. So, C.G. Speziale, B.E. Launder (Eds.), Near-Wall Turbulent Flows, Elsevier, Amsterdam, 1993, pp. 609–619] and Lange et al. [C.F. Lange, F. Durst, M. Breuer, Wall effects on heat losses from hot-wires. Int. J. Heat Fluid Flow 20 (1999) 34] next to a thermally non-conducting wall.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 49, Issues 5–6, March 2006, Pages 905–918
نویسندگان
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