Versatile models for condensation of fluids with widely varying properties from the micro to macroscale

Srinivas Garimella, Brian M. Fronk, Jeffrey A. Milkie, Brendon L. Keinath

Research output: Contribution to conferencePaperpeer-review

7 Scopus citations


Over the past several years, a considerable amount of data on heat transfer and pressure drop during condensation of a variety of fluids in channels with hydraulic diameters in the 0.1 mm - 15 mm range has been collected by the authors. These data have been obtained in circular and non-circular channels for a range of pure synthetic, hydrocarbon, and other natural refrigerants (e.g., R-134a, R-245fa, n-pentane, carbon dioxide, ammonia), and azeotropic mixtures (R-404A, R-410A). In addition, these data span reduced pressures from 0.03 < Pr < 0.9, essentially spanning the entire vapor-liquid dome, over a range of mass fluxes from 50 < G < 800 kg/m2-s. Across such a wide range of fluid properties (differing by an order of magnitude), operating conditions and channel geometries, the forces governing the transfer of heat, mass and momentum vary considerably. The probabilities of gravity, shear and surface tension driven flow mechanisms, void fractions and phase distributions, and other phenomena change significantly across this wide parameter range, significantly affecting the local transport phenomena. This paper represents an attempt to develop unified models that are able to predict condensation heat transfer for this vast range of fluids, operating conditions, and geometries while accounting for the varying flow mechanisms and transitions. Such a generally applicable model for predicting heat transfer in condensing flows is critical for the realization of highly efficient, compact thermal energy systems.

Original languageEnglish (US)
StatePublished - 2014
Event15th International Heat Transfer Conference, IHTC 2014 - Kyoto, Japan
Duration: Aug 10 2014Aug 15 2014


Conference15th International Heat Transfer Conference, IHTC 2014

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Condensed Matter Physics


Dive into the research topics of 'Versatile models for condensation of fluids with widely varying properties from the micro to macroscale'. Together they form a unique fingerprint.

Cite this