R
Ralph L. Webb
Researcher at Pennsylvania State University
Publications - 151
Citations - 9463
Ralph L. Webb is an academic researcher from Pennsylvania State University. The author has contributed to research in topics: Heat transfer & Heat exchanger. The author has an hindex of 50, co-authored 151 publications receiving 8672 citations.
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Principles of Enhanced Heat Transfer
TL;DR: In this article, the authors evaluated two-phase heat exchangers for single-phase flows and showed that they can achieve state-of-the-art performance in terms of heat transfer.
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Performance evaluation criteria for use of enhanced heat transfer surfaces in heat exchanger design
TL;DR: In this paper, a broad range of Performance Evaluation Criteria (PEC) applicable to single-phase flow in tubes is presented and detailed procedures are outlined to calculate the performance improvement and to select the optimal surface geometry.
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Forced convection heat transfer in helically rib-roughened tubes
D.L. Gee,Ralph L. Webb +1 more
TL;DR: In this paper, a single-phase forced convection in a circular tube containing a two-dimensional rib roughness was investigated and the authors extended the state-of-the-art by examining the effect of the rib helix angle.
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Correlation of two-phase friction for refrigerants in small-diameter tubes
Ming Zhang,Ralph L. Webb +1 more
TL;DR: In this article, a new correlation for two-phase friction pressure drop in small diameter tubes was developed by modifying the Friedel correlation, which predicts 119 data points with a mean deviation of 11.5%.
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Heat transfer and friction in the offset stripfin heat exchanger
Himanshu M. Joshi,Ralph L. Webb +1 more
TL;DR: In this article, an analytical model was developed to predict the heat transfer coefficient and friction factor of offset strip-fin heat exchanger surface geometry. But the model was not applied to the LAMINAR and TURBORN flow regimes.