000170445 001__ 170445
000170445 005__ 20260420103355.0
000170445 0247_ $$2doi$$a10.1016/j.ijthermalsci.2026.110845
000170445 0248_ $$2sideral$$a148929
000170445 037__ $$aART-2026-148929
000170445 041__ $$aeng
000170445 100__ $$0(orcid)0000-0001-5561-5457$$aCollado, Francisco J.$$uUniversidad de Zaragoza
000170445 245__ $$aVoid fraction profile for subcooled flow boiling through reversing saturation
000170445 260__ $$c2026
000170445 5060_ $$aAccess copy available to the general public$$fUnrestricted
000170445 5203_ $$aThis work is a continuation of a previous one (F.J. Collado, Phys. Fluids 34, 2022, 123302) where a new model of vapor void fraction was compared against some tests of the void axial profile for upward subcooled flow boiling of water reported by MPI in the eighties. The new void model was based on a new energy balance where heat was divided by the mean vapor-liquid velocity ratio, or slip ratio. The model tried to predict the slip ratio profile, next the mixture enthalpy could be derived from the new heat balance and finally the void fraction was obtained. The mixture enthalpy was based on the classic thermodynamic quality, which includes the void fraction. The slip ratio profile model proposed was dependent on five unknown parameters, although only two new thermo-kinematic equations were suggested then solving two parameters. In this work, the new slip ratio profile model has been simplified to just three parameters and, correspondingly, three new equations have been proposed. First, the continuity of the first derivative of the mixture velocity but here modified by the new slip function. Second, a new equation resulting of the theoretical equilibrium liquid velocity intercept with the reversing vapor velocity from saturation. And third, a new procedure for searching the best location of the onset of nucleate boiling (ONB), which is based on minimizing the absolute error, is suggested. Moreover, thermal approximations to the best ONB found are explored. This simplified void model is favorably checked against the full set (twenty-four) of void fraction profile MPI tests.
000170445 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000170445 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000170445 7102_ $$15004$$2590$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Máquinas y Motores Térmi.
000170445 773__ $$g226 (2026), 110845 [22 pp.]$$pInt. j. therm. sci.$$tINTERNATIONAL JOURNAL OF THERMAL SCIENCES$$x1290-0729
000170445 8564_ $$s11766268$$uhttps://zaguan.unizar.es/record/170445/files/texto_completo.pdf$$yVersión publicada
000170445 8564_ $$s2426727$$uhttps://zaguan.unizar.es/record/170445/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000170445 909CO $$ooai:zaguan.unizar.es:170445$$particulos$$pdriver
000170445 951__ $$a2026-04-18-10:49:42
000170445 980__ $$aARTICLE