Richard J. Goldstein, Associate Fellow

Computational Study on Heat Transfer in Nanofluids; Numerical Simulation of Instantaneous Energy Separation; Heat Transfer at High Rayleigh Number

Polarization ratio image of human red blood cell cluster formed by nine red blood cells. This image is taken by an imaging ellipsometer. The contrast comes from the variations of thickness and refractive index of the sample.

The researchers considered the numerical simulation of instantaneous energy separation. Instantaneous flow and total temperature field were numerically simulated to investigate the mechanisms of energy separation in shear and jet flows. The instantaneous pressure and temperature fluctuation within the flows provide information for understanding of the mechanisms of energy separation.

Another area of research involves heat transfer in gas turbines, which are widely used for power generation in industries. Since complicated geometries in gas turbines induce three-dimensional flow structure, heat transfer and fluid flow characteristics are not yet fully understood. In addition, computational fluid dynamics does not predict heat transfer and fluid flow correctly because of this complication flow structure. Using the results of experimental and computational analysis, this group is constructing a numerical prediction model of heat transfer and realizing the limitation of heat transfer models in three-dimensional flow.

Further research involved the analysis of natural convection and heat transfer, which requires a high Rayleigh number. Flow and heat transfer systems at high Rayleigh number (~O(10¹⁵)) in a Benard convection cell were numerically simulated using a spectral/Chebyshev collocation method. The researchers identified Rayleigh numbers at which transitions in the behavior of Nusselt number occur, and then studied the mechanisms responsible for such transitions.

Research Group

Genick Bar-Meir (Meyerson), Research Associate
E. R. G. Eckert, Faculty Collaborator
Bumsoo Han, Graduate Student Researcher
Sangjo Han, Graduate Student Researcher
Peitong Jin, Graduate Student Researcher
Yuli Kornblum, Adjunct Faculty Collaborator
Kaustubh Kulkarni, Graduate Student Researcher
Min Ho Lee, Graduate Student Researcher
Arvind S. Pachhapur, Graduate Student Researcher
Surachai Sanitjai, Graduate Student Researcher
Vinod Srinivasan, Graduate Student Researcher
Larry Stone, Graduate Student Researcher
Prasad S. B. Terala, Graduate Student Researcher