Work

Vapor Thermodynamics and Fluid Merit for Pulsating Heat Pipe

Year: 2026

Type: article

Abstract: In this communication, we discuss a theoretical description of the vapor-phase thermodynamics in the pulsating heat pipe (PHP), to be used in numerical simulations. We advance a theory based on simulation results that allows us to derive a theoretical expression for a dimensionless quantity describing the vapor properties of a given fluid. One can use this quantity to evaluate the fluid merit for use in the PHP. This theory is compared with the simulation results obtained using the PHP simulation code CASCO. We compare the merits of water, ethanol, and FC-72 and show that water possesses better properties for use in PHPs.

Source: Strojniški vestnik – Journal of Mechanical Engineering

DOI: 10.5545/sv-jme.2026.1779

Authors: Vadim Nikolayev, Iaroslav Nekrashevych

Institutions: Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, CEA Paris-Saclay

Language: English

Topic: Heat Transfer and Boiling Studies

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funders: European Space Agency, Centre National d’Etudes Spatiales

Award: G610071136