TY JOUR TI INVESTIGATION OF THE PROCESS OF FREE CONVECTION DURING DRYING OF BULK MATERIALS KW self-ignition KW self-heating KW bulk material KW moisture content of bulk material KW convective drying KW heat transfer coefficient JO MONITORING AND EXPERTISE IN SAFETY SYSTEM AU Kuzmin, A.A. AU Romanov, N.N. AU Permyakov, A.A. PY 2026 IS 2026 PB Saint-Petersburg University of State Fire Service of Emercom of Russia