Heat and mass transfer in composite droplets before the start of puffing/micro-explosion: the effect of internal convection; Fuel; Vol. 414

Heat and mass transfer in composite droplets before the start of puffing/micro-explosion: the effect of internal convection

Bibliographic Details
Parent link:Fuel.— .— Amsterdam: Elsevier Science Publishing Company Inc.
Vol. 414.— 2026.— Article number 138260, 12 p.
Main Author: Antonov D. V. Dmitry Vladimirovich
Other Authors: Strizhak P. A. Pavel Alexandrovich, Sazhin S. S. Sergey Stepanovich
Summary:Title screen
A two-dimensional model describing fluid dynamics and heat/mass transfer processes in composite water/fuel droplets, preceding puffing/micro-explosion within them, is suggested and implemented in COMSOL Multiphysics software. The results of calculations are verified by comparing them with the predictions of the previously developed models in the limiting case of spherically symmetric geometry and processes. The validation of the model is performed using the experimental data for composite droplets introduced into air at constant velocity and temperature. The observed times to puffing/micro-explosion are demonstrated to be close to the predicted ones. These times predicted by the new model are shown to be shorter than those predicted by the previously developed one-dimensional model of the processes in moving composite droplets in which the internal convection in droplets is ignored but the effects of droplet movement on the Nusselt and Sherwood numbers are taken into account. The new model is used for the analysis of the processes in composite droplets with parameters typical of the combustion chambers of ground-based, marine and aircraft engines. It is demonstrated that internal convective flows are the primary cause of the displacement of the water sub-droplets in composite droplets. The formation of two toroidal vortices in these droplets is predicted
Текстовый файл
AM_Agreement
Language:English
Published: 2026
Subjects:
электронный ресурс
труды учёных ТПУ
Puffing
Micro-explosion
Composite droplets
Internal convection
Mathematical modelling
Online Access:https://doi.org/10.1016/j.fuel.2026.138260
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=684495

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