Set a hot temperature and a cool/surroundings temperature, then tune each mode's controls. Conduction, convection and radiation each compute their own rate — watch which one wins as you change the slab, the airflow and the glow.
Conduction kAΔT/d
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Convection hAΔT
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Radiation εσA(T4−Ts4)
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Dominant
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Hot temperature T200 °C
Cool / surroundings Ts20 °C
Conductivity k50.00 W/m·K
Slab thickness d0.050 m
Convection h25 W/m²·K
Emissivity ε0.90
Surface area A = 1 m² (fixed) · σ = 5.67 × 10-8 W/m²·K4 · radiation uses kelvin.
Thin, conductive slabs make conduction huge; strong airflow favours convection; very hot bodies make radiation climb steeply (∝ T4). Set T = Ts and every rate falls to zero.