Does pressure influence flow over density?

fj70 · December 20, 2019, 00:18

I have two 1cuft containers under vacuum.

Both containers are in atmospheres that have the same air density.

Container #1 is in atmosphere with 0.075lb/cuft with 70F temperature and 29.92inHg.

Container #2 is in atmosphere also with 0.075lb/cuft, but with a temperature of 80F and 30.5inHg.

If there is a valve on each container and they are opened for 0.1ms, will both containers have that same amount of atmosphere, or will container #2 have more since pressure is higher?

LuckyTran · December 20, 2019, 03:07

It depends how big is this valve, but nominally yes.

fj70 · December 20, 2019, 10:04

Quote:

Originally Posted by LuckyTran

It depends how big is this valve, but nominally yes.

Can you explain how the size of the valve would matter?

And I assume when you said "yes", meant both would have the same amount?

Thanks for responding!

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December 20, 2019, 00:18	Does pressure influence flow over density?	#1
fj70 New Member Join Date: Dec 2019 Posts: 2 Rep Power: 0	I have two 1cuft containers under vacuum. Both containers are in atmospheres that have the same air density. Container #1 is in atmosphere with 0.075lb/cuft with 70F temperature and 29.92inHg. Container #2 is in atmosphere also with 0.075lb/cuft, but with a temperature of 80F and 30.5inHg. If there is a valve on each container and they are opened for 0.1ms, will both containers have that same amount of atmosphere, or will container #2 have more since pressure is higher?

December 20, 2019, 03:07		#2
LuckyTran Senior Member Lucky Join Date: Apr 2011 Location: Orlando, FL USA Posts: 5,747 Rep Power: 66	It depends how big is this valve, but nominally yes.