[magijer]

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

[CaptainRich]

Water does not compress. Are you looking for thermal expansion and/or contraction?
Try this link:
properties of water - Google Search

[CaptainRich]

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.

[CaptainRich]

Upon further research, I found this:

Water (molecule - Wikipedia, the free encyclopedia)

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.

[Capuchin]

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. :)

[CaptainRich]

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!

[sanjiv deshmukh]

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.

[ihab alaa mosa]

Which has more compressibility water or steel

[ihab alaa mosa]

Which has more compressibility factor (water or steel) ?

[Unknown008]

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

[jstans7]

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

[jstans7]

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.

[DWDriller]

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/physic...er-150423.html

[DWDriller]

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

CRC handbook of tables for applied ... - Ray E. Bolz, George Lewis Tuve - Google Books