| Texto completo | |
| Autor(es): |
Salamanca, Jefferson
;
Farres, Rodrigo D. G.
;
Gradeck, Michel
;
Oliveira, Arthur V. S.
Número total de Autores: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | HEAT TRANSFER ENGINEERING; v. N/A, p. 13-pg., 2025-12-05. |
| Resumo | |
Estimating boundary conditions during spray cooling requires the solution of a transient heat conduction inverse problem in a three-dimensional space, so the heat dissipation caused by the impact of each droplet can be captured. In this paper, the quality of the heat flux estimate is evaluated for single and multiple droplet impact on a heated surface. We used classical integral transform to solve the heat equation and we employed Beck's function specification method for regularization. Based on experimental results, two heat flux profiles were used to simulate the heat dissipation by droplet impact: one corresponding to the deposition regime and another corresponding to the Leidenfrost regime. The results show that the proposed inverse method succeeds in capturing the heat flux profile for both one- and two-droplet simulations, especially for the Leidenfrost regime. An analysis of the droplet size effect showed that estimates of the dissipated heat by the droplet are accurate if the diameter of the heat transfer area is larger than at least ten times the pixel size. Meanwhile, the spacing between two impacting droplets has minor effect. Finally, a Monte Carlo simulation allowed to estimate the accuracy of the estimated dissipated heat as 10% with 95% of confidence interval. (AU) | |
| Processo FAPESP: | 21/01897-0 - Estudo experimental do impacto de gotas sobre superfícies aquecidas usando técnicas ópticas combinadas: gotas isoladas, múltiplas gotas e sprays |
| Beneficiário: | Arthur Vieira da Silva Oliveira |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 25/01107-0 - Estudo experimental e numérico da dinâmica de impacto e transferência de calor no processo de resfriamento por spray |
| Beneficiário: | Jefferson David Salamanca Cárdenas |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |