Numerical Study of the Magnetohydrodynamic Heat Transfer Peristaltic Flow in Tube Against High Reynolds Number

Abstract In this work, we study the heat transfer performance and particle dynamics of a highly mass loaded, compressible, particle-laden flow in a horizontally-oriented pipe using an Eulerian-Eulerian (two-fluid) computational model. An attendant experimental configuration [1] provides the basis for the study. Specifically, a 17 bar co-flow of nitrogen gas and copper powder are modeled with inlet Reynolds numbers of 3×104, 4.5×104, and 6×104 and mass loadings of 0, 0.5, and 1.0. Eight binned particle sizes were modeled to represent the known powder properties. Significant settling of all particle groups are observed leading to asymmetric temperature distributions. Wall and core flow temperature distributions are observed to agree well with measurements. In high Reynolds number cases, the predictions of the multiphase computational model were satisfactorily aligned with the experimental results. Low Reynolds number model predictions were not as consistent with the experimental measurements.

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Row Removal Heat Transfer Study for Pin Fin Arrays

Volume 5A: Heat Transfer ◽

10.1115/gt2014-25348 ◽

2014 ◽

Cited By ~ 4

Author(s):

Kathryn L. Kirsch ◽

Jason K. Ostanek ◽

Karen A. Thole ◽

Eleanor Kaufman

Keyword(s):

Heat Transfer ◽

Reynolds Number ◽

High Reynolds Number ◽

Pin Fin ◽

Heat Transfer Augmentation ◽

Aspect Ratios ◽

Pin Fins ◽

High Reynolds ◽

Pin Fin Arrays ◽

Transfer Study

Arrays of variably-spaced pin fins are used as a conventional means to conduct and convect heat from internal turbine surfaces. The most common pin shape for this purpose is a circular cylinder. Literature has shown that beyond the first few rows of pin fins, the heat transfer augmentation in the array levels off and slightly decreases. This paper provides experimental results from two studies seeking to understand the effects of gaps in pin spacing (row removals) and alternative pin geometries placed in these gaps. The alternative pin geometries included large cylindrical pins and oblong pins with different aspect ratios. Results from the row removal study at high Reynolds number showed that when rows four through eight were removed, the flow returned to a fully-developed channel flow in the gap between pin rows. When larger alternative geometries replaced the fourth row, heat transfer increased further downstream into the array.

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Aerodynamics and Heat Transfer Investigations on a High Reynolds Number Turbine Cascade

Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration ◽

10.1115/91-gt-157 ◽

1991 ◽

Cited By ~ 6

Author(s):

Taher Schobeiri ◽

Eric McFarland ◽

Frederick Yeh

Keyword(s):

Heat Transfer ◽

Reynolds Number ◽

High Reynolds Number ◽

Test Facility ◽

Experimental Investigations ◽

Turbine Cascade ◽

Calculation Methods ◽

Transfer Coefficients ◽

Pressure Distributions ◽

High Reynolds

In this report the results of aerodynamic and heat transfer experimental investigations performed in a high Reynolds number turbine cascade test facility are analyzed. The experimental facility simulates the high Reynolds number flow conditions similar to those encountered in the space shuttle main engine. In order to determine the influence of Reynolds number on aerodynamic and thermal behavior of the blades, heat transfer coefficients were measured at various Reynolds numbers using liquid crystal temperature measurement technique. Potential flow calculation methods were used to predict the cascade pressure distributions. Boundary layer and heat transfer calculation methods were used with these pressure distributions to verify the experimental results.

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