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Article by Physics Department Student Kim Ji-hwan, Professor Park Jeong-hyuck, and Sogang Institute for Whole Person Education Professor Kim Do-hyun

Published in Prestigious Frontiers in Physics Journal

- Presenting a fluids equation closest to the actual state of fluids, using a novel quantum statistical mechanics method -



 (From left) Physics Department student Kim Ji-hwan, Sogang Institute for Whole Person Education Professor Kim Do-hyun, and Physics Department Professor Park Jeong-hyuck


A research team consisting of student Kim Ji-hwan (first author) of the Department of Physics, Professor Kim Do-hyun (co-corresponding author) of the Sogang Institute for Whole Person Education, and Professor Park Jeong-hyuck (co-corresponding author) of the Department of Physics formulated a new fluids equation of state, using statistical mechanics, and conducted experimental comparison and verification of the equation. The research findings were published in Frontiers in Physics, a leading journal in physics, under the title “Janus van der Waals Equations for Real Molecules with Two-Sided Phase Transitions.”


There have been many experimental areas that are inconsistent with real fluids in existing equations of state, including the most widely known van der Waals equation, because they were formulated with classic methods. The latest fluids equation suggested by the Sogang research team was formulated using a novel quantum statistical mechanics method. It was well tested against 11 real molecules for which reference data were disclosed by the National Institute of Standards and Technology (NIST). 


Realizing the importance of analytic properties at an early stage, instead of focusing on the thermodynamic limit in statistical mechanics, Professor Park has tirelessly carried out relevant research studies. As a statistical physicist, Professor Kim possesses a special expertise in analyzing fluids test data. Student Kim Ji-hwan, who understood the importance of this research, was in charge of performing the actual analysis. These three co-researchers cooperated with each other and were successful in formulating a novel fluids equation that represents the closest example to the state of real fluids in the history of physics.


Professor Kim Do-hyun remarked, “The thermodynamic limit has been considered a norm in conventional thermodynamics and statistical physics. This research provides a decisive occasion for a novel viewpoint that can replace the idea of the thermodynamic limit to be discussed openly in the physics field, which makes this research particularly significant.”

 

 

▶ Title of article: Janus van der Waals Equations for Real Molecules with Two-Sided Phase Transitions

▶ Link: https://doi.org/10.3389/fphy.2022.917453




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