Gnielinski’s correlation and a modern temperature-oscillation method for measuring heat transfer coefficients

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00366757" target="_blank" >RIV/68407700:21220/22:00366757 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1051/epjconf/202226901009" target="_blank" >https://doi.org/10.1051/epjconf/202226901009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/epjconf/202226901009" target="_blank" >10.1051/epjconf/202226901009</a>

Result language

angličtina

Original language name

Gnielinski’s correlation and a modern temperature-oscillation method for measuring heat transfer coefficients

Original language description

The heat transfer coefficient is one of the most important parameters in the design of apparatuses in which convective heat transport takes place. Classical direct methods based on determining basic thermal quantities can be used for measuring heat transfer coefficients. Another option is to measure concentrations, electric current or other quantities that can be transformed to thermal quantities using the analogy between heat and mass transport. The temperature-oscillation method is less frequently used, although the theoretical basis of the method dates back to 1997, and although the method has the major advantage that the heat transfer coefficients can be measured without making any contact with the heat transfer surface. In the temperature-oscillation method, the heat transfer surface is exposed to an oscillating heat flux, and the temperature response on this surface can be measured by a contactless method (e.g. infra-red thermography). The heat transfer coefficients can be determined on the basis of mathematical relations between the oscillating heat flux and the temperature response. However, the method depends on an appropriate method for processing the measured data when it is necessary to correct some conditions that are not included in the mathematical model. This paper evaluates the impact of processing the experimental data on the resulting heat transfer coefficients in one of the basic geometrical configurations – the flow of a liquid in a pipe with a circular cross section. In this paper, we present the results of a comparison of real experiments based on the temperature oscillation method and numerical modeling of the heat transfer in this geometry, using the ANSYS CFD commercial system.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20402 - Chemical process engineering

Project

<a href="/en/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Research centre for low-carbon energy technologies</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

EPJ Web of Conferences

ISBN

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ISSN

2100-014X

e-ISSN

2100-014X

Number of pages

12

Pages from-to

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Publisher name

EPJ Web of Conferences

Place of publication

Les Ulis Cedex A

Event location

Liberec

Event date

Nov 23, 2021

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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