Hi,

I have to calculate the pressure drop in a steel pipe filled with water. To do that I need the compressibility facor of water in relation to the themperature (greek : X).
There shoould be a graphique that shows the relationship between the two but I can't find it anywhere.
Is there somebody who can give me a link or even the graphique (or formula) itself?

Kind regards,

Peter

Water does not compress. Are you looking for thermal expansion and/or contraction?
Try this link:
properties of water - Google Search (http://www.google.com/search?hl=en&q=properties+of+water&btnG=Google+Search)

I've always been told that water cannot be compressed.
Do you have something you could share with us (me) to correct my lack of knowledge?
I'd appreciate your input, Capuchin.

Upon further research, I found this:

Water (molecule - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Water_(molecule))


The compressibility of water is a function of pressure and temperature. At 0 °C in the limit of zero pressure the compressibility is 5.1×10-5 bar−1. In the zero pressure limit the compressibility reaches a minimum of 4.4×10-5 bar−1 around 45 °C before increasing again with increasing temperature. As the pressure is increased the compressibility decreases, being 3.9×10-5 bar−1 at 0 °C and 1000 bar. The bulk modulus of water is 2.2×109 Pa. The low compressibility of non-gases, and of water in particular, leads to them often being incorrectly labelled as incompressible. The low compressibility of water means that even in the deep oceans at 4000 m depth, where pressures are 4×107 Pa, there is only a 1.8% decrease in volume.

I wrongly assumed that what I was taught and told was correct. My mistake.
Peter, I hope this better answers your original concern.

Incompressibility of liquids is a nice simplification that is near enough to true for most applications like pneumatics etc. It simplifies a lot of the math.

An interesting result of incompressibility is that sound waves cannot propagate through an incompressible medium. This obviously is not the case for everyday materials. :)

Not through, but how about across the surface of such medium?
**edit** fluid or solid?

Since my earlier ignorance, I reseached some and learned a little about compessiblity of materials and learned a little about Osmium... unique stuff!

550 of water in a DI pipe at 11 Kg/sqcm pressure, pressure drops to 7 Kg/sqcm. What quantity of water must have been lost. Please give reasons with formulas or some suggestions.

Which has more compressibility water or steel

Which has more compressibility factor (water or steel) ?

Well, ask yourself what can you compress more easily, a metal bar, or a bottle completely filled with water?

There is a compressibility factor for water, but it is ridiculously small, a 1 followed by many 0's until we hit a value.

There is a compressibility factor, but it is ridiculously small, A 1 followed by many zeroes until we hit a number. I don't recall it (who would), but an elementary physics manual should have it.

I do not have a temperature correction handy, but you can likely find this answer in from the same source which I found the answer to compressibility with respect to pressure change.

From the 'CRC Handbook of Tables for Applied Science', Table 1-50, you can see that compressibility of water is estimated at 0.0045, which is defined as deltaV / V in percent for water for each atm pressure applied, and at 1 atm and atmosperhic temperature (not significantly affected by temperature at range of 0-100 deg F).

Web address to table:
https://www.askmehelpdesk.com/physics/compressibility-factor-water-150423.html

Sorry I entered an incorrect website link.
Try this one.

CRC handbook of tables for applied ... - Ray E. Bolz, George Lewis Tuve - Google Books (http://books.google.com/books?id=Xn8KbsgeFrwC&pg=PA95&lpg=PA95&dq=engineering+applied+science+tables+of+compressi bility+of+fluids&source=bl&ots=RlWoGsu6lv&sig=k1aCUTH7YJLKyrWR9bN0wkcBmgE&hl=en&ei=S22QTqUcyI6xAoGgjaEB&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCQQ6AEwAA#v=onepage&q&f=false)