Journal of Engineering Physics and Thermophysics is a translation of Inzhenerno-fizicheskii Zhurnal,
a publication of the Academic Scientific Complex "A. V. Luikov Heat and Mass Transfer Institute"
of the National Academy of Sciences of Belarus
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UNSTEADY FREE-CONVECTION HEAT TRANSFER DURING VORTEX 
FLOW IN A HORIZONTAL TUBE

V. F. Vinokurov, O. G. Martynenko,
P. P. Khramtsov, and I. A. Shikh

UDC 532.516

We conducted a theoretical and experimental investigation 
of the hydrodynamic structure and unsteady free-convection heat transfer 
in a round horizontal tube under different conditions of the second 
kind. During the experiment the Grashof number varied from Gr = 1.54x
105 to Gr = 7.9x105. Using the interferometric
method we investigated the distribution of the temperature field for
different structures of a free-convection flow in the tube.

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