Hi, Help! I am a technician working with a bunch of engineers and it's apparant that I need heat transfer lessons.
I need to understand how air flow and velocity changes in my forced air convection oven will affect the heat-up rate of my parts (with air temperature held constant). Can I calculate how much air flow (CFM) is required to heat a given thermal mass to temperature within x amount of time? I imagine the number depends on the size of the pores through which the volume of air is moving, because smaller pores = faster speed = more turbulence. Can I calculate the airspeed where I change from laminar to turbulent, or do I have to find that point experimentally with a smoke stick? (Yuck, it makes contamination) . . . .
Thx --
I need to understand how air flow and velocity changes in my forced air convection oven will affect the heat-up rate of my parts (with air temperature held constant). Can I calculate how much air flow (CFM) is required to heat a given thermal mass to temperature within x amount of time? I imagine the number depends on the size of the pores through which the volume of air is moving, because smaller pores = faster speed = more turbulence. Can I calculate the airspeed where I change from laminar to turbulent, or do I have to find that point experimentally with a smoke stick? (Yuck, it makes contamination) . . . .
Thx --