Applied Physics and Mathematics Annotation << Back THE INITIAL STAGE OF FREE CONVECTION TRANSPORT IN A CLOSED REGION WITH A HEAT SOURCE V.I. RYAZHSKIKH, YU.YU. GROMOV, A.V. RYAZHSKIKH, S.V. KOSTYKOV, E.V. RYAZHSKIKH Carried out experimental-theoretical studies of unsteady temperature fi eld in the pilot plant with a closed area in the form of the right of the box if there are source of warmth that made it possible to assess the duration of a conductive regime of free convection and propose a methodology for identifying the temporary border between Laminar and combination modes. Keywords: free thermal convection, experiment, method of calculation. DOI: 10.25791/pfim.04.2018.140 Contacts: E-mail: ryazhskih_vi@mail.ru Pp. 10-16.