equations for pressure drop for flow in spirals
equations for pressure drop for flow in spirals
(OP)
I have a tank bottom's spiral jacket and I need to estimate the pressure drop for water flow.
I looked in Perry's:
"the pressure drop for flow in spirals es discussed by Srinivasan...." but there is no formula and I'm not able to found it in any article.
Could anyone help me?
thanks in advance
j
I looked in Perry's:
"the pressure drop for flow in spirals es discussed by Srinivasan...." but there is no formula and I'm not able to found it in any article.
Could anyone help me?
thanks in advance
j





RE: equations for pressure drop for flow in spirals
The friction factor:
Where D (m) is the inner tube diameter, and Dc (m) is the coil diameter.
The formula applies when 0.34<Re(D/Dc)2<300
and the friction drop:
L: length of coil, m
density of fluid: for water, 1000 kg/m3
V: fluid velocity, m/s
As a reference Professor Lydersen also mentions Srinivasan et al.: "Friction factors for coils", Trans. Instn. Chem. Engrs., 48, T156-T 161 (1970)
I hope this is of help.
RE: equations for pressure drop for flow in spirals
these are the same formulas proposed on Perry's handbook.
but what happens in a spiral pipe with a increasing/decreasing diameter?
thanks
j