convert M/second into M³/Hour

tigerstyle · 10 May 2011 at 15:11

I know the conversion isn't 100% accurate, but how can I convert velocity (metres/second) into volume (metres³/hour)???

say my speed is 5M/s and the duct size is 0.4X0.4M

My google fu is weak today

GravyMonster · 10 May 2011 at 15:13

Your google fu is indeed weak. You should not have come.

Flow = Velocity X Diameter² X 2.445

http://www.pumpcalcs.com/calculators/view/72/

Greenlizard0 · 10 May 2011 at 15:14

Isn't it just .4x.4x5?

Edit - ah there's another constant.^

bam0 · 10 May 2011 at 15:14

cross section * speed * 3600 surely?

Alex74 · 10 May 2011 at 15:15

Do you mean air passing through the duct at 5m/s? and you want the volume of air passing through a given cross section per hour?

At a guess, every second you have 5*0.4*0.4 metres^3 of air moving through your little cross sectional area. So multiply up by 3600 i suppose and you'll have metres^3/hour.

Will give something like 2880 m^3/h

Sunbed · 10 May 2011 at 15:16

Q = vA

so, Q (flow) = 5 * 0.4 * 0.4 = 0.8 m^3/s

0.8 * 60 * 60 = 2880 m^3/hour

edit: damn beaten to it

bam0 · 10 May 2011 at 15:22

Spunkey said:
Your google fu is indeed weak. You should not have come.

Flow = Velocity X Diameter² X 2.445

http://www.pumpcalcs.com/calculators/view/72/

Ouch, fail. You didn't seem to notice that your link has that extra multiplication factor in because it's using US imperial units.

tigerstyle · 10 May 2011 at 18:38

Thanks guys, I've had a rough day.

joey2cool · 10 May 2011 at 19:35

google fu, love that lol