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1 PublicationEvaluation of the microlayer contribution to bubble growth in horizontal pool boiling with a mechanistic model that considers dynamic contact angle and base expansion
Ding, W.; Krepper, E.; Hampel, U.
Abstract
Recently a new mechanistic model for pool and nucleate flow boiling was developed in our group. This model is based on the balance of forces acting on a bubble and considers the evaporation of the microlayer underneath the bubble, thermal diffusion around the cap of bubble due to the super-heated liquid and condensation due to the sub-cooled liquid. Compared to other models we particularly consider the temporal evolution of the microlayer underneath the bubble during the bubble growth by consideration of the dynamic contact angle and the dynamic bubble base expansion. This enhances, in our opinion, the model accuracy and generality. In this paper we further evaluate this model with experiments and direct numerical simulation (DNS) in order to prove the importance of dynamic contact angle and bubble base expansion.
Keywords: Nucleate boiling; Microlayer; Force balance; Dynamic contact angle; Dynamic base expansion; Bubble geometry
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International Journal of Heat and Fluid Flow 72(2018), 274-287
DOI: 10.1016/j.ijheatfluidflow.2018.06.009
Cited 24 times in Scopus
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