What is the internal air pressure of a wrapped (with micro holes) food product heated in a microwave oven if I know how much steam is generated

Question

Food product is in a sealed wrapper, with 44 laser cut holes of 150 micron. (0.7mm sq hole area total).
When heated, product generates 2.2l of steam over 15 seconds. (33ml/sec)

How do I calculate the maximum internal air pressure inside the wrapper during the steam escape to see whether it exceeds the bursting pressure for the wrapper seals?

Ninkeebun · Answer

thanks for thoughts on this. I think I have resolved it. The web site below gives the formula for calculating air flow through an orifice. Knowing the external pressure as 1 bar, orifice size of 0.7mm and rate of steam generation 33ml/sec the formula gives me the internal pressure. (1.3bar)which is within the seal burst tolerance.
Formula is at - https://www.tlv.com/global/UK/calculator/air-flow-rate-through-orifice.html?advanced=on#

What is the internal air pressure of a wrapped (with micro holes) food product heated in a microwave oven if I know how much steam is generated

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