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2. Heat Transfer Around Sharp 180-deg Turns in Smooth Rectangular Channels
3. Fan, C.S. and Metzger, 1969, Effects of channel Aspect Ratio on Heat Tranfer in rectangular Passage Sharp 180-deg turns, ASME paper.
4. Jonhson, J.P., 1976, Internal Flow In Turbulence (Edited by P. Bradshaw). Chap. 3, Springer-Verlag, Berlin.
5. Regional Heat Transfer in Two-Pass and Three-Pass Passages With 180-deg Sharp Turns