TY - JOUR
T1 - An indirect criterion for the laminar to turbulent flow transition in shear-driven annular liquid films
AU - Cioncolini, Andrea
AU - Del Col, Davide
AU - Thome, John R.
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - An indirect method to identify the laminar to turbulent flow transition in shear-driven annular liquid films has been developed and used, together with literature measurements of the velocity profile, to approximately resolve the near wall structure in shear-driven annular liquid films. The limits between the laminar sublayer and the buffer layer and between the buffer layer and the turbulent layer have been found to correspond to about 9 and 40 wall units, respectively, which are higher than the corresponding limits of 5 and 30 wall units typical of single-phase boundary layers, thus indicating a weaker turbulence intensity in shear-driven annular liquid films with respect to single-phase wall-bounded flows. Additionally, a simple laminar to turbulent flow transition criterion and a prediction method for the average liquid film thickness have been developed for evaporation and condensation applications.
AB - An indirect method to identify the laminar to turbulent flow transition in shear-driven annular liquid films has been developed and used, together with literature measurements of the velocity profile, to approximately resolve the near wall structure in shear-driven annular liquid films. The limits between the laminar sublayer and the buffer layer and between the buffer layer and the turbulent layer have been found to correspond to about 9 and 40 wall units, respectively, which are higher than the corresponding limits of 5 and 30 wall units typical of single-phase boundary layers, thus indicating a weaker turbulence intensity in shear-driven annular liquid films with respect to single-phase wall-bounded flows. Additionally, a simple laminar to turbulent flow transition criterion and a prediction method for the average liquid film thickness have been developed for evaporation and condensation applications.
KW - Annular two-phase flow
KW - Laminar to turbulent flow transition
KW - Laminarization
KW - Shear-driven liquid film
KW - Thin liquid film
KW - Turbulence emergence
UR - http://www.scopus.com/inward/record.url?scp=84930653910&partnerID=8YFLogxK
U2 - 10.1016/j.ijmultiphaseflow.2015.05.002
DO - 10.1016/j.ijmultiphaseflow.2015.05.002
M3 - 文章
AN - SCOPUS:84930653910
SN - 0301-9322
VL - 75
SP - 26
EP - 38
JO - International Journal of Multiphase Flow
JF - International Journal of Multiphase Flow
ER -