COMPARATIVE STUDY ON HEAT TRANSFER CALCULATION IN TRANSITION AND TURBULENT FLOW REGIME INSIDE TUBES

In this paper is compared a proposal model for heat transfer calculations during fluid flow in single-phase inside tubes with others existing in the literature. This comparison used 3096 available experimental data of 36 different fluids. The proposal model is valid for a range from to and 0.65 to for Reynolds and Prandtl number respectively, dimensionless length values and viscosity correction in the interval . The comparison proves that the suggested model presents the better index of correlation, being found an average error of 13.8% in the 80.6% of the experimental data and a maximum error of 24.6%.

Download Full-text

Suggested Model for Heat Transfer Calculation During Fluid Flow in Single Phase Inside Pipes (II)

International Journal of Heat and Technology ◽

10.18280/ijht.370131 ◽

2019 ◽

Vol 37 (1) ◽

pp. 257-266 ◽

Cited By ~ 3

Author(s):

Yanán Camaraza-Medina ◽

Ken Mortensen-Carlson ◽

Pratijay Guha ◽

Ángel Rubio-Gonzales ◽

Oscar Cruz-Fonticiella ◽

...

Keyword(s):

Heat Transfer ◽

Fluid Flow ◽

Single Phase ◽

Suggested Model ◽

Heat Transfer Calculation

Download Full-text

New model for heat transfer calculation during fluid flow in single phase inside pipes

Thermal Science and Engineering Progress ◽

10.1016/j.tsep.2019.03.014 ◽

2019 ◽

Vol 11 ◽

pp. 162-166 ◽

Cited By ~ 2

Author(s):

Yanán Camaraza-Medina ◽

Oscar Miguel Cruz-Fonticiella ◽

Osvaldo F. García-Morales

Keyword(s):

Heat Transfer ◽

Fluid Flow ◽

Single Phase ◽

New Model ◽

Heat Transfer Calculation

Download Full-text

New Improved Method for Heat Transfer Calculation Inside Rough Pipes

Journal of Heat Transfer ◽

10.1115/1.4051125 ◽

2021 ◽

Author(s):

Yanan Camaraza-Medina ◽

Abel Hernandez-Guerrero ◽

J. Luis Luviano-Ortiz

Keyword(s):

Heat Transfer ◽

Single Phase ◽

Average Error ◽

Organic Liquids ◽

Practical Application ◽

Improved Method ◽

Technical Literature ◽

Proposed Model ◽

Validity Range ◽

Heat Transfer Calculation

Abstract An improved method for heat transfer calculation inside rough tubes is provided. The model has been obtained from a second assessment developed early by the authors on fluid flow in single-phase inside rough tubes. The proposed correlation has been verified by comparison with a total of 1666 experimental available data of 34 different fluids, including air, gases, water and organic liquids. The proposal model covers a validity range for Prandtl number ranging from 0.65 to 4.52?×10?^4, values of Reynolds number from 2.4×?10?^(3 )to 8.32×?10?^6, a range of relative roughness ranging from 5×?10?^(-2 )to 2×?10?^(-6 ), and viscosity ratio from 0.0048 to 181.5. The proposed model provides a good correlation for ?10?^4=Re and Re<?10?^4, with an average error of 18.3% for 70.4% of the data and 16.6% for 74.8% of the data, respectively. The method presents a satisfactory agreement with the experimental data in each interval evaluated; therefore, the model can be considerate accurate enough for practical application. At the present time, in the available technical literature, a method with similar characteristics is unknown.

Download Full-text

Water Single-Phase Fluid Flow and Heat Transfer in Capillary Tubes

1st International Conference on Microchannels and Minichannels ◽

10.1115/icmm2003-1037 ◽

2003 ◽

Cited By ~ 24

Author(s):

A. Bucci ◽

G. P. Celata ◽

M. Cumo ◽

E. Serra ◽

G. Zummo

Keyword(s):

Heat Transfer ◽

Experimental Data ◽

Reynolds Number ◽

Heat Transfer Coefficient ◽

Fluid Flow ◽

Laminar Flow ◽

Transfer Coefficient ◽

Single Phase ◽

Heat Transfer Correlations ◽

Good Agreement

This paper reports the results of an experimental investigation of fluid flow and single-phase heat transfer of water in stainless steel capillary tubes. Three tube diameters are tested: 172 μm, 290 μm and 520 μm, while the Reynolds number varying from 200 up to 6000. Fluid flow experimental results indicate that in laminar flow regime the friction factor is in good agreement with the Hagen-Poiseuille theory for Reynolds number below 800–1000. For higher values of Reynolds number, experimental data depart from the Hagen-Poiseuille law to the side of higher f values. The transition from laminar to turbulent regime occurs for Reynolds number in the range 1800–3000. This transition is found in good agreement with the well known flow transition for rough commercial tubes. Heat transfer experiments show that heat transfer correlations in laminar and turbulent regimes, developed for conventional size tubes, are not adequate for calculation of heat transfer coefficient in microtubes. In laminar flow the experimental values of heat transfer coefficient are generally higher than those calculated with the classical correlation, while in turbulent flow regime experimental data do not deviate significantly from classical heat transfer correlations. Deviation from classical heat transfer correlations increase as the channel diameter decrease.

Download Full-text

Method for heat transfer calculation on fluid flow in single-phase inside rough pipes

Thermal Science and Engineering Progress ◽

10.1016/j.tsep.2019.100436 ◽

2019 ◽

Vol 14 ◽

pp. 100436 ◽

Cited By ~ 1

Author(s):

Yanán Camaraza-Medina ◽

Andrés A. Sánchez Escalona ◽

Oscar Miguel Cruz-Fonticiella ◽

Osvaldo F. García-Morales

Keyword(s):

Heat Transfer ◽

Fluid Flow ◽

Single Phase ◽

Heat Transfer Calculation

Download Full-text

Regeneratively cooled scramjet heat transfer calculation and comparison with experimental data

Proceedings of the Institution of Mechanical Engineers Part G Journal of Aerospace Engineering ◽

10.1177/0954410013488737 ◽

2013 ◽

Vol 228 (8) ◽

pp. 1227-1234 ◽

Cited By ~ 6

Author(s):

Jin Jiang ◽

Ruo-ling Zhang ◽

Jia-ling Le ◽

Wei-xiong Liu ◽

Yang Yang ◽

...

Keyword(s):

Heat Transfer ◽

Experimental Data ◽

Heat Transfer Calculation ◽

Comparison With Experimental Data

Download Full-text

Heat Transfer Analysis of Passive Residual Heat Removal Heat Exchanger under Natural Convection Condition in Tank

Science and Technology of Nuclear Installations ◽

10.1155/2014/279791 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 7

Author(s):

Qiming Men ◽

Xuesheng Wang ◽

Xiang Zhou ◽

Xiangyu Meng

Keyword(s):

Heat Transfer ◽

Heat Exchanger ◽

Thermal Stratification ◽

Heat Removal ◽

Heat Transfer Analysis ◽

Average Error ◽

Water Tank ◽

Shaped Tube ◽

Heat Transfer Calculation ◽

Residual Heat

Aiming at the heat transfer calculation of the Passive Residual Heat Removal Heat Exchanger (PRHR HX), experiments on the heat transfer of C-shaped tube immerged in a water tank were performed. Comparisons of different correlation in literatures with the experimental data were carried out. It can be concluded that the Dittus-Boelter correlation provides a best-estimate fit with the experimental results. The average error is about 0.35%. For the tube outside, the McAdams correlations for both horizontal and vertical regions are best-estimated. The average errors are about 0.55% for horizontal region and about 3.28% for vertical region. The tank mixing characteristics were also investigated in present work. It can be concluded that the tank fluid rose gradually which leads to a thermal stratification phenomenon.

Download Full-text

Algorithm Scheme to Simulate the Distortions during Gas Quenching in a Single-Piece Flow Technology

Coatings ◽

10.3390/coatings10070694 ◽

2020 ◽

Vol 10 (7) ◽

pp. 694 ◽

Cited By ~ 1

Author(s):

Jacek Sawicki ◽

Krzysztof Krupanek ◽

Wojciech Stachurski ◽

Victoria Buzalski

Keyword(s):

Heat Transfer ◽

Experimental Data ◽

High Pressure ◽

Heat Transfer Coefficient ◽

Fluid Flow ◽

Transfer Coefficient ◽

Single Piece ◽

Gas Quenching ◽

Complex Fluid ◽

Algorithm Scheme

Low-pressure carburizing followed by high-pressure quenching in single-piece flow technology has shown good results in avoiding distortions. For better control of specimen quality in these processes, developing numerical simulations can be beneficial. However, there is no commercial software able to simulate distortion formation during gas quenching that considers the complex fluid flow field and heat transfer coefficient as a function of space and time. For this reason, this paper proposes an algorithm scheme that aims for more refined results. Based on the physical phenomena involved, a numerical scheme was divided into five modules: diffusion module, fluid module, thermal module, phase transformation module, and mechanical module. In order to validate the simulation, the results were compared with the experimental data. The outcomes showed that the average difference between the numerical and experimental data for distortions was 1.7% for the outer diameter and 12% for the inner diameter of the steel element. Numerical simulation also showed the differences between deformations in the inner and outer diameters as they appear in the experimental data. Therefore, a numerical model capable of simulating distortions in the steel elements during high-pressure gas quenching after low-pressure carburizing using a single-piece flow technology was obtained, whereupon the complex fluid flow and variation of the heat transfer coefficient was considered.

Download Full-text

Numerical Investigation of Heat Transfer Characteristics of Different Nanoparticles Using Modified Eulerian-Eulerian Model

ASME 2020 Power Conference ◽

10.1115/power2020-16808 ◽

2020 ◽

Author(s):

Muzafar Hussain ◽

Shahbaz Tahir

Keyword(s):

Heat Transfer ◽

Experimental Data ◽

Heat Exchangers ◽

Single Phase ◽

Reynolds Numbers ◽

Operating Conditions ◽

Phase Model ◽

Heat Transfer Characteristics ◽

Eulerian Model ◽

Transfer Characteristics

Abstract Nanofluids are widely adopted nowadays to enhance the heat transfer characteristics in the solar applications because of their excellent thermophysical properties. In this paper, a modified Eulerian-Eulerian model recently developed based on experiments was validated numerically to account for the deviations from the experimental data. The modified Eulerian-Eulerian model is compared with the single-phase model, Eulerian-Eulerian models for TiO2-water at different operating conditions and deviation from the experimental data for each of the model was documented. However, the modified Eulerian-Eulerian model gave much closer results when compared to the experimental data. For the further extension of work, the modified Eulerian-Eulerian model was applied to different nanofluids in order to investigate their heat transfer characteristics. Three different nanoparticles were investigated namely Cu, MgO, and Ag and their heat transfer characteristics is calculated based on the modified Eulerian-Eulerian model as well as the single-phase model for the comparison. For lower values of Reynolds numbers, the average heat transfer coefficient was almost identical for both models with small percentage of error but for higher Reynolds numbers, the deviation got larger. Therefore, single-phase model is not appropriate for higher Reynolds numbers and modified Eulerian-Eulerian model should be used to accurately predict the heat transfer characteristics of the nanofluids at higher Reynolds numbers. From the analysis it is found that the Ag-water nanofluid have the highest heat transfer characteristics among others and can be employed in the solar heat exchangers to enhance the heat transfer characteristics and to further improve the efficiency.

Download Full-text