Warming Milk Ryan Dymock Nathan Albrechtsen

Purpose When Samantha is hungry, she wants milk NOW!! Doctors claim that breast milk should not be warmed in the microwave to preserve nutritional value There are also theories that microwaves create “hot spots” that can burn Samantha’s mouth How fast can we warm Samantha’s milk with hot water?

Model - Cylinder.05m.076m

Measurement

Prediction p = 997 kg/(m^3) Cp = 4179 j/kg h = 450 W/m^2 As =.012m^2 V = 1.7e-4m^3 To = 290 K Tinf = 368 K *Note: Although Bi >> 0.1, lumped capacitance yields accurate results

Results

Conclusions Sometimes Lumped Capacitance Model still yields very accurate results when Bi > 0.1 Samantha’s milk can be warmed from the fridge in less than one minute if it is submerged in boiling water