TY JOUR TI HEAT TRANSFER IN ANNULAR CHANNELS KW convective heat exchange KW heat conductivity KW heat transfer coefficient KW heat flux KW heat flux density JO Bulletin of KSAU AU Enyutina, T.A. AU Tereshchenko, V.M. AU Patrusheva, T.N. AU Bondarev, V.S. AU Marchenkova, S.G. PY 2018 IS PB Krasnoyarsk State Agrarian University