Under single-phase
forced convection regime, both coolant density qc and specific heat
cp
are constant in the range of temperature of interest; consequently, as Q _ c ¼ qcV _ ccpðTout TinÞ, V _ c / ðTout TinÞ i.e. the (Tout
Tin) difference will increase linearly as the coolant volumetric
flow rate V _ c diminishes