TY JOUR TI NUMERICAL MODEL OF FREE CONVECTION IN THE SPACE OF SCREEN-VACUUM INSULATION UNDER THE THERMAL EXPOSURE KW liquefied natural gas KW coaxial double-walled pipeline KW screen-vacuum insulation KW free convection KW coaxial space JO MONITORING AND EXPERTISE IN SAFETY SYSTEM AU Kuzmin, A.A. AU Romanov, N.N. AU Gabieva, K.N. PY 2024 IS 2024 PB Saint-Petersburg University of State Fire Service of Emercom of Russia