Talk:Venturi tube: Difference between revisions
imported>Milton Beychok m (Created the Talk subpage) |
imported>Paul Wormer (→Bernoulli equation: new section) |
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This articles was written from scratch. [[User:Milton Beychok|Milton Beychok]] 15:30, 20 March 2010 (UTC) | This articles was written from scratch. [[User:Milton Beychok|Milton Beychok]] 15:30, 20 March 2010 (UTC) | ||
== Bernoulli equation == | |||
I have a (small) problem with the height ''h'' in the Bernoulli equation. Now height is defined of a '''point''', which implies that there may a difference in gravitational attraction over the cross section (as opposed to the length) of a tube. Later ''h''<sub>1</sub> is canceled against ''h''<sub>2</sub> for the gravitational terms in a horizontal tube, which implies that ''h'' is assumed constant over the cross-sectional dimension. It seems to me that ''h'' is (approximated as) a function of ''one'' dimension. In cylinder coordinates with the axis of the tube as ''z''-axis, my guess is that ''h'' is a function of ''z'' only and not of ''r'' and θ. This is physically reasonable and allows cancellation of the gravitational terms in a horizontal tube. --[[User:Paul Wormer|Paul Wormer]] 07:49, 29 March 2010 (UTC) | |||
Revision as of 02:49, 29 March 2010
This is a new article
This articles was written from scratch. Milton Beychok 15:30, 20 March 2010 (UTC)
Bernoulli equation
I have a (small) problem with the height h in the Bernoulli equation. Now height is defined of a point, which implies that there may a difference in gravitational attraction over the cross section (as opposed to the length) of a tube. Later h1 is canceled against h2 for the gravitational terms in a horizontal tube, which implies that h is assumed constant over the cross-sectional dimension. It seems to me that h is (approximated as) a function of one dimension. In cylinder coordinates with the axis of the tube as z-axis, my guess is that h is a function of z only and not of r and θ. This is physically reasonable and allows cancellation of the gravitational terms in a horizontal tube. --Paul Wormer 07:49, 29 March 2010 (UTC)