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how high is the hig pressure mean?

how high is the hig pressure mean?

(OP)
I am reading papers relate to the viscosity of the gas mixture which is one of the consideration in an experiment.

It seems there are various numerical ways to calculate the viscosity of the gas mixture. For instance Wilke, chapman and etc.

So I tried to use some of them to compare with the acutal experiment to find valid method in approximating the Reynolds number.

However, it is said that there are not many data for gas mixture viscosity at high pressure, but there are for many data at low pressure.

And here, I wonder how high is the high pressure mean.

Some example calculation shows that low pressure as 30~40bar, while some high pressure measurnt were taken at 35~50 bar. which for me isn't a big difference.

So, can anyone descibe the range of high pressure in normal context?

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