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[26694] Artykuł:

Boiling heat transfer in vertical minichannels. Liquid crystal experiments and numerical investigations

Czasopismo: International Journal of Thermal Sciences   Tom: 48, Zeszyt: 6, Strony: 1049-1059
ISSN:  1290-0729
Wydawca:  ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 23 RUE LINOIS, 75724 PARIS, FRANCE
Opublikowano: Czerwiec 2009
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału
Liczba
punktów
Sylwia Hożejowska orcid logoWZiMKKatedra Matematyki *****4024.00  
Magdalena Piasecka orcid logoWMiBMKatedra Mechaniki**4024.00  
Mieczysław PoniewskiPolitechnika Warszawska20.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 24
Klasyfikacja Web of Science: Article


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Keywords:

Flow boiling incipience  Heat polynomials  Inverse boundary problem  Liquid crystals  Minichannel 



Abstract:

The paper presents the results of experimental and numerical studies of boiling heat transfer in the flow of refrigerants R123 and R11 through vertical, rectangular minichannels, with one wall heated. An application of liquid crystal thermography has helped detect two-dimensional temperature distribution on the heating surface, allowing determination of boiling heat fluxes and experimental boiling curves. The main objectives of the paper included the development of two-dimensional approach to solve the inverse heat conduction boundary problem for determining local values of internal heating surface temperature, boiling heat flux and heat transfer coefficient, and the improvement of the applied numerical method making use of the equalizing calculus and heating surface temperature measurement errors. A detailed discussion of temperature, heat flux and heat transfer coefficient errors is also provided. (c) 2008 Elsevier Masson SAS. All rights reserved.