List of publications on a keyword: «unpacking»


Физика

Publication date: 05.12.2018
Evaluate the material Average score: 0 (Всего: 0)
Haydarov Gennadiy Gasimovich , candidate of technical sciences , associate professor
Haydarov Andrey Gennadyevich , candidate of technical sciences , associate professor
St. Petersburg State Technological Institute (Technological University) , Санкт-Петербург г

«Representation of capillary phenomena from the physical model of unpacking a liquid»

Download an article

Based on the physical model of «unpacking» a fluid, published in 1983 to explain the physical nature of surface tension, an explanation of capillary phenomena was proposed. The unified physical nature of the condensation process and the processes in the capillaries expressed in terms of the surface tension of the liquid is proved. To prove the applicability of the «unpacking» model for capillary phenomena, an empirical Borelli-Jurin formula for determining the height of fluid lifting in capillaries was theoretically derived depending on the magnitude of the surface tension. The assumptions under which the formula is obtained are indicated. In addition, the article proposes a new formula for determining the maximum height of liquid lift in the capillaries, depending on the critical temperature of the liquid and the molecular weight of the liquid.

Publication date: 05.05.2016
Evaluate the material Average score: 0 (Всего: 0)
Haydarov Gennadiy Gasimovich , candidate of technical sciences , associate professor
Haydarov Andrey Gennadyevich , candidate of technical sciences , associate professor
St. Petersburg State Technological Institute (Technological University) , Санкт-Петербург г

«Interconnection between melting, boiling and critical points»

Download an article

We received theoretical formulas of the interconnection between melting, boiling and critical temperatures. Uniform physical representation of melting, boiling and evaporation processes was the basis for deriving the formula of interconnection between them. We use the concept of the material substance internal energy in terms of the molecules “unpacking” idea. The reference manual data on 85 substances from 13 to 855 degrees Kelvin confirms the theoretically derived formulas. We carried out the comparison of theoretical formulas and experimental data by their mean values. A simple ideal substance model with spherical molecules was considered as a model of substance molecule. The melting point is 1/3, and the boiling point ranges from 1/2 to 2/3 of the critical point for this model.

Publication date: 11.07.2018
Evaluate the material Average score: 0 (Всего: 0)
Haydarov Gennadiy Gasimovich , candidate of technical sciences , associate professor
Haydarov Andrey Gennadyevich , candidate of technical sciences , associate professor
St. Petersburg State Technological Institute (Technological University) , Санкт-Петербург г

«Correlation of temperatures of melting and boiling of substances from the hypotheses of unpacking the substance»

Download an article

According to the properties of melting points and boiling points of the elements of the periodic table of D.I. Mendeleyev the application of the unpacking hypothesis of the substance was verified. The article contains the results of the verification. In general, according to the data for 98 substances taken from the information in Internet, convergence of results with an error of up to 40% for 73 substances was obtained. The effect of periodicity on the result is found. An exception to the calculated dependences was obtained for ten substances: noble gas and most halogens. A large discrepancy between the theoretical formulas and the reference data was also caused by the 14 elements of the middle groups.