Tag: FLOW REGIME

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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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Pressure Drop and Flow Regime Map for Vertical Upflow in Piping

December 13, 2016

HTRI research focusing on large diameter pipes led to improved prediction of flow patterns and valuable guidance to operators. Author Siddharth Talapatra, Senior Project Engineer, Research Date December 11, 2016 Liquid-gas two-phase flow can be challenging for the oil and gas, process, and nuclear industries due to the fact that a...
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• PRESSURE DROP
• FLOW REGIME

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Research Update: Two-phase Flow Research - Key Findings and Impact

April 13, 2017

HTRI recently concluded research in the following topics: Vertical Upflow – pressure drop and void fraction Vertical Upflow – flow regime map Vertical Downflow – pressure drop and void fraction Vertical Downflow – flow regime The details of the research, results, and discussions have been published in HTRI research reports TPF-14,...
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• FLOW REGIME
• PRESSURE DROP
• REPORT
• RESEARCH
• TWO-PHASE FLOW

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TPG-7 Challenges of Simulating Complete Intube Phase Change with CFD

March 13, 2017

Over the past several decades, the accuracy and usability of computational methods have substantially improved. This report reviews the complicated physics of two-phase flow and phase change, presents the equations of motion for a two-phase flow with various closure models, and compares current computational approaches. Although inadequate for the entire spectrum of...
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• CFD
• TWO-PHASE FLOW
• BOILING
• CONDENSATION
• FLOW REGIME

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TPF-16 Flow Regime, Void Fraction, and Pressure Drop for Adiabatic Vertical Downflow

March 06, 2017

Adiabatic air-water studies were performed in a large pipe with vertical downflow, using a section of the HTRI air-water flow loop. High-speed videos of the downflow were analyzed to estimate the void fraction and to obtain a flow regime map. A falling film annular flow regime was observed for most flow...
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• FLOW REGIME
• TWO-PHASE FLOW

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Research Update: A Review of Shellside Flow Regimes

January 16, 2017

This webinar provides a review of current HTRI, open literature, and HTFS research on shell flow regimes. The best available flow regime map will be identified, and focus areas of further research efforts will be discussed....
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• FLOW REGIME
• HTFS
• RESEARCH
• SHELLSIDE

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