Data Driven Analysis for Departure Behavior Characteristics of Flow Boiling Bubbles in the Vertical Channel[J]. 2020, 54(11): 175-184.
DOI:
Data Driven Analysis for Departure Behavior Characteristics of Flow Boiling Bubbles in the Vertical Channel[J]. 2020, 54(11): 175-184.DOI: 10.7652/xjtuxb202011021.
Data Driven Analysis for Departure Behavior Characteristics of Flow Boiling Bubbles in the Vertical Channel
To reveal the bubble detachment behaviors during subcooled boiling process
a data driven statistical analysis method according to the finite mixing model(FMM)and the standard variance decomposition(Sobol model)is employed to investigate the influence factors of bubble departure diameter on superheated wall surface in vertical flow boiling. The data driven database is constructed and modified based on the experimental data and empirical correlations collected from literature. The dimensionless parameters describing flow boiling are chosen as the input variables of this model
and bubble departure diameter as the output variable. Kullback-Leibler divergence and χ
2
distance are adopted for determining the importance degree order of input variables. T
he preliminary results of sensitivity analysis show that the effects of Reynolds number and vapour-liquid density ratio on bubble departure diameter are the most significant among these inputs. The results coincide well with those obtained by the traditional methods
which indicates the feasibility of the data-driven method in analyzing engineering problems. In addition
FMM is more general than Sobol model based on the present database
and can be applied directly based on these data.
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references
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