Tag: SINGLE-PHASE

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RR-7 Assessment of Lattice Boltzmann Method for Simulating Thermal Hydraulic Phenomena

April 24, 2025

Modeling and simulation of some complex heat transfer processes require research and development beyond current HTRI capabilities. Conventional computational fluid dynamics (CFD) tools offer a continuum macroscopic modeling approach which may be difficult to implement without knowledge of the relevant physical models. However, the lattice Boltzmann method captures the intricacies of more  complicated...
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• TWO-PHASE FLOW
• SINGLE-PHASE
• FLOW REGIME

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STS-4 Heat Transfer in Liquid Metals

January 29, 2025

Most experimental and numerical investigations on heat transfer in liquid metals with Pr < 0.1 concern tubeside flow, but a select few focus on shellside flow. This report reviews and compares single-phase heat transfer correlations for liquid metals in turbulent flow. It demonstrates that different sets of correlations should be used...
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• SINGLE-PHASE
• SHELL-AND-TUBE
• HEAT TRANSFER

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S-ST-1-18 Modified Tubeside Heat Transfer Method for Supercritical Carbon Dioxide and Water

July 10, 2023

Further analysis of data summarized in STG-22 leads to a simplified modeling option that improves the prediction of tubeside heat transfer data reported in literature for supercritical water and carbon dioxide. The new approach applies a multiplier to the HTRI single-phase correlation and decreases the heat transfer overprediction near the maximum...
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• SINGLE-PHASE
• HEAT TRANSFER

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S-SS-3-30 Predictions of Single-phase Flow in TEMA F-shell Heat Exchanger: CFD vs. Xist

December 21, 2022

This report compares computational fluid dynamics (CFD) and Xist predictions of single-phase performance in a TEMA F-shell heat exchanger with a sealed longitudinal baffle. In the initial comparison, CFD underpredicted both duty (16% less) and pressure drop (over 50% less). We then represented an F shell in Xist using two E-shell...
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• XIST
• SINGLE-PHASE
• CFD
• BAFFLE

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S-ST-1-17 Using Neural Networks for Predicting Nusselt Number for Intube Laminar Flows

July 25, 2022

Neural networks can be used to predict the Nusselt number for intube laminar flow. In addition to describing the architecture of a neural network, this report discusses the application of a neural network to a manufactured data set, open literature data, HTRI data, and CFD simulation results. Our results illustrate the...
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• SINGLE-PHASE
• HORIZONTAL TUBES
• HEAT TRANSFER
• CONVECTION

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PHE-17-TR Liquid-phase and Boiling Testing in a Welded Plate Heat Exchanger

March 07, 2018

HTRI conducted liquid-phase and phase-change experiments in a welded plate heat exchanger (WPHE) provided by Hisaka Works, Ltd. With the test plate pack installed vertically, cold fluid flowed horizontally, and steam condensed downward. We conducted single-phase and boiling tests using p-xylene as the test fluid, as well as boiling tests using...
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• BOILING
• PLATE HEAT EXCHANGER
• SINGLE-PHASE
• XPHE

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TT-15 Condensing heat transfer across inline low-finned tube bundles in cross flow

January 26, 2017

Component: Xace, Xist Date posted: 22 May 2012 Last updated: 7 August 2024 Externally finned tube bundles can be specified for condensing applications where the outside heat transfer coefficient is less than the inside coefficient and where the shellside thermal resistance dominates. Although condensing applications with inline low-finned tubes are rare,...
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• CROSSFLOW
• FINNED TUBES
• SINGLE-PHASE

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TE-6 Correlations for Heat Transfer and Pressure Drop of Tube Inserts in Single-phase Turbulent Swirl Flow

January 16, 2017

This report describes the mechanism behind turbulent swirl flow augmentation inside a tube, as well as the development of heat transfer and pressure drop correlations for Reynolds numbers between 3000 and 500000. The correlations have application independent of the specific swirl flow insert type. This report also identifies the lower bound...
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• TUBE INSERT
• SINGLE-PHASE
• PRESSURE DROP
• HEAT TRANSFER
• ENHANCEMENTS

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Research Update: Single-Phase Crossflow Methods

January 16, 2017

HTRI continues to improve its single-phase crossflow methods. We have completed a thorough review of heat transfer and pressure drop correlations for single-phase flow outside banks of plain- and low-finned tubes. This webinar highlights some of our findings and summarizes the performance of the improvements we are proposing for our correlations....
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• CROSSFLOW
• FINNED TUBES
• PLAIN TUBE
• PRESSURE DROP
• RESEARCH
• SINGLE-PHASE

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S-ST-1-14 CFD Study of Single-Phase Laminar Mixed Convection in Inclined Tubes

January 16, 2017

To gain insight into the thermal-hydraulic phenomena associated with mixed convection in internal flows, we used computational fluid dynamics (CFD) to conduct a parametric study of single-phase laminar liquid flows in inclined tubes with isothermal, uniform wall temperatures (UWT). Both heating and cooling processes were simulated to isolate the effects of...
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• XIST
• SINGLE-PHASE
• CFD

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STG-13 Computational Fluid Dynamics Study of Impingement Plates

January 16, 2017

The results of a computational fluid dynamics (CFD) study of impingement devices for inlet nozzles on shell-and-tube heat exchangers reveal the deleterious effects of increased velocity and pressure drop for a number of configurations. Simulations of entry flows with round and square solid plates as well as with rod grids were...
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• SINGLE-PHASE
• SHELL-AND-TUBE
• IMPINGEMENT RODS
• CFD

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