The self-similar turbulent flow of low-pressure water vapor

Abstract

We studied turbulent flows of water vapor in a pipe connecting two closed vessels of equal volume. The vessel that served as a source of water vapor was filled with adsorbent in the form of corundum ceramic balls. These ceramic balls were used to obtain specific conditions to lower the vapor pressure in the source vessel that had been observed earlier. A second vessel, which served as a receiver, was empty of either air or vapor before each vapor sampling. The rate of the pressure increase in the receiver vessel was measured in a series of six samplings performed with high precision. The pressure reduction rate in the source vessel was found to be three times lower than the pressure growth rate in the receiver vessel. We found that the pressure growth rates in all of the adjacent pairs of samples could be arranged in a combination that appeared to be identical for all pairs, and this revealed the existence of a rather interesting and peculiar self-similarity law for the sampling processes under consideration.

Experiments for observation of self-similar effects in water vapor near saturation pressure at room temperature

“…The following describes the procedure by which those water vapor samples are found for which the self-similarity mode is realized. In this case according to previous experiments [2,3] the gas pressure functions P(t) at the leading edges of the samples are subject to analysis. In this work, we use a visual method for determining the similarity coefficient 3/4 of two neighboring samples.…”

Two states of liquid water with a qualitative difference in behavior of saturated vapor pressure

“…Analysis of water vapor pressure by taking small samples which picked out from the surface of a solid adsorbent such as corundum ceramics saturated previously with water vapor * Author to whom any correspondence should be addressed. allowed us to detect the effect of self-similarity [2]. We discovered even earlier the effect of thermodynamic nonequilibrium of the ortho-pair of nuclear spin states for the water molecule [3].…”