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From: Clemens Winkler <ClemensWinkler@gmx.net>
Newsgroups: comp.soft-sys.matlab
Subject: Re: SimHydraulics: "Hydraulic Fluid" question
Date: Tue, 12 Aug 2008 09:00:14 -0700 (PDT)
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On 12 Aug., 17:44, Simo Kauth <ka...@hrz.tu-chemnitz.de> wrote:
> The bulk modulus already tells you, how the fluid reacts on a change in
> pressure:http://en.wikipedia.org/wiki/Bulk_modulus
> So: Yes, there is still a dependency on the pressure

But I do have a book, which gives for a mineral oil the dependency of
the bulk modulus against the pressure. So the bulk modulus must change
with the pressure. I see that you are from the "TU", so you surely
know "Dubbel". The chapter about "Fluidische Antriebe" gives a plot
for the oil "HLP46": bulk modulus over pressure (H - Fluidische
Antriebe, page H22 Bild 3, Dubbel (2007)).

But as this is not the oil I need the data for, I'm looking for a
formula which gives me the correct dependency.

Clemens.