Yehuda Taitel

Bio: Yehuda Taitel is an academic researcher from Tel Aviv University. The author has contributed to research in topics: Two-phase flow & Slug flow. The author has an hindex of 38, co-authored 96 publications receiving 5594 citations. Previous affiliations of Yehuda Taitel include University of Houston & University of Tulsa.

Modelling flow pattern transitions for steady upward gas-liquid flow in vertical tubes

Abstract: Models for predicting flow pattern transitions during steady gas-liquid flow in vertical tubes are developed, based on physical mechanisms suggested for each transition. These models incorporate the effect of fluid properties and pipe size and thus are largely free of the limitations of empirically based transition maps or correlations.

Two-Phase Slug Flow

Abstract: Publisher Summary Slug flow is a highly complex type of flow with an unsteady nature The prediction of pressure drop, heat, and mass transfer for such flow is often considered a difficult task The chapter deals with steady slug flow The chapter introduces several options of modeling the hydrodynamic parameters and pressure drop using a unified approach that is applicable for the vertical, horizontal, and inclined cases The chapter also reviews transient phenomena in slug flow by illustrating an example of severe slugging in a pipeline-riser system It is noted that heat transfer in slug flow is of major importance for practical applications The treatment of the two-phase flow is usually considered as a two-phase mixture The severe slugging that consists of one riser and one pipeline is one of the simplest example of slug flow under nonsteady conditions The Boe criterion differentiates between steady and cyclic operations with two exceptions At high liquid flow rates, a steady flow can also exist within the severe slugging region predicted by the Boe criterion There is a region outside the Boe criterion that is in an unsteady state and leads to unsteady oscillations

Flow pattern in horizontal and vertical two phase flow in small diameter pipes

Abstract: New data on flow pattern transition for gas liquid flow in small diameter tubes (4 to 12 mm) is presented. The experimental results are compared with previously published models for horizontal and vertical flows considered to be valid for medium and large diameter pipes. The effect of surface tension which might be expected to be important in small diameter pipe flow has been found to affect only the stratified-slug transition in horizontal flow. A modification to the model to include this effect is proposed.

Fundamental issues related to flow boiling in minichannels and microchannels

Abstract: Flow boiling in small hydraulic diameter channels is becoming increasingly important in many diverse applications. The previous studies addressing the effects of the channel size on the flow patterns, and heat transfer and pressure drop performance are reviewed in the present paper. The fundamental questions related to the presence of nucleate boiling and characteristics of flow boiling in microchannels and minichannels in comparison to that in the conventional channel sizes (3 mm and above) are addressed. Also, the effect of heat exchanger configuration—single-channel and multichannel—on the heat transfer and pressure drop performance is reviewed. The areas for future research are identified.