B NIST database and compressibility factor Z

AI Thread Summary
The NIST database offers extensive data on various fluids, including Nitrogen, across a wide range of pressures and temperatures. However, there are concerns regarding the accuracy of the compressibility factor data, as it may not align with established charts like Standing and Katz's. Users are questioning whether the NIST data is based on approximations or calculated using specific formulas. The original poster later found the reference articles that clarify the data sources. This highlights the importance of verifying data accuracy when using large databases for experimental research.
FranzSC
Messages
2
Reaction score
1
TL;DR Summary
Is NIST database accurate?
There's a huge volume of data on NIST database:
https://webbook.nist.gov/cgi/fluid....nit=m/s&VisUnit=uPa*s&STUnit=N/m&RefState=DEF

I'm interested in getting extensive sets of experimental data for the compressibility factor of Nitrogen. Could not find them anywhere until now, so it seems strange to me that NIST has a huge database for all ranges of pressures and temperatures. Do any of you know if the data on NIST database are approximations calculated with some formulae? For example, the NIST data do not seem to represent the Standing and Katz's chart accurately. Thanks.
 
Physics news on Phys.org
My bad, I finally found the reference articles for the database. Sorry.
 
Thread 'Question about pressure of a liquid'
I am looking at pressure in liquids and I am testing my idea. The vertical tube is 100m, the contraption is filled with water. The vertical tube is very thin(maybe 1mm^2 cross section). The area of the base is ~100m^2. Will he top half be launched in the air if suddenly it cracked?- assuming its light enough. I want to test my idea that if I had a thin long ruber tube that I lifted up, then the pressure at "red lines" will be high and that the $force = pressure * area$ would be massive...
I feel it should be solvable we just need to find a perfect pattern, and there will be a general pattern since the forces acting are based on a single function, so..... you can't actually say it is unsolvable right? Cause imaging 3 bodies actually existed somwhere in this universe then nature isn't gonna wait till we predict it! And yea I have checked in many places that tiny changes cause large changes so it becomes chaos........ but still I just can't accept that it is impossible to solve...
Back
Top