Numerical analysis of convective heat transfer of nanofluids in circular ducts with two-phase mixture model approach

Date

2016-09-01

Author

Sert, İsmail Ozan
Sezer Uzol, Nilay

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

142
views

0
downloads

Computational fluid dynamics simulations for initially hydro-dynamically fully developed laminar flow with nanofluids in a circular duct under constant wall temperature condition are performed with two-phase mixture model by using Fluent software. Thermal behaviors of the system are investigated for constant wall temperature condition for Al2O3/water nanofluid. Hamilton–Crosser model and the Brownian motion effect are used for the thermal conductivity model of nanofluid instead of the Fluent default model for mixtures which gives extraordinary high thermal conductivity values and is valid for macro systems. Also, thermal conductivity and viscosity of the base fluid are taken as temperature dependent. The effects of nanoparticle volume fraction, nanoparticle size, and inlet Peclet number on the heat transfer enhancement are investigated. The results are compared with single-phase results which give slightly lower heat transfer coefficient values than the results of two-phase mixture model.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84945585493&origin=inward
https://hdl.handle.net/11511/97181

Journal

Heat and Mass Transfer/Waerme- und Stoffuebertragung

DOI

https://doi.org/10.1007/s00231-015-1655-7

Collections

Department of Aerospace Engineering, Article

Suggestions

OpenMETU
Core

Numerical simulation of transient turbulent flow in a heated pipe Uygur, Ahmet Bilge; Selçuk, Nevin; Oymak, Olcay; Department of Chemical Engineering (2002) A computational fluid dynamics (CFD) code based on direct numerical simulation (DNS) and the method of lines MOL approach developed previously for the solution of transient two-dimensional Navier-Stokes equations for turbulent, incompressible, internal, non-isothermal flows with constant wall temperature was applied to prediction of turbulent flow and temperature fields in flows dominated by forced convection in circular tubes with strong heating. Predictive ability of the code was tested by comparing its r...
Investigation of structural properties of boron carbide nanosystems under mechanical and thermal effects: molecular dynamics simulations Şimşek, Yusuf; Erkoç, Şakir; Sezgi, Naime Aslı; Department of Micro and Nanotechnology (2014) Structural properties of various boron-carbide nanosystems with different sizes have been investigated by performing classical molecular dynamics simulation techniques at several temperatures. Studied boron carbide systems are icosahedral nanoribbons and nanosheets, graphene like armchair and zigzag type of monolayer and bilayer boron carbide nanoribbons and nanosheets, armchair and zigzag type of boron carbide nanotubes, cubic form nanorods and nanosheets. Stillinger-Weber potential energy function paramet...
Numerical Analysis of Nanofluids Convective Heat Transfer with Euler Euler and Mixture Model Approaches Sert, İsmail Ozan; Sezer Uzol, Nilay; Güvenç Yazıcıoğlu, Almıla; Kakaç, Sadık (2014-06-13) Forced convection heat transfer characteristics of Al2O3/water nanofluid are investigated numerically by using mixture model two-phase flow approach with Fluent software. The initially hydro-dynamically fully developed laminar nanofluid flow simulations are performed with different nanoparticle volume fractions. The effects of thermal conductivity and viscosity models on heat transfer enhancements are carried out for constant heat flux boundary condition. As a result, the heat transfer coefficient results o...
Numerical analysıs of nanofluıds convectıve heat transfer wıth mıxture model approaches Sert, Ismail Ozan; Sezer Uzol, Nilay; Kakaç, Sadık (2014-01-01) Forced convection heat transfer characteristics of Al2O3/water nanofluid are investigated numerically by using mixture model two-phase flow approach with Fluent software. The initially hydro-dynamically fully developed laminar nanofluid flow simulations are performed with different nanoparticle volume fractions. The effects of thermal conductivity and viscosity models on heat transfer enhancements are carried out for constant heat flux boundary condition. As a result, the heat transfer coefficient results o...
Modeling of surge and swab pressure of yield power law fluids Erge, Öner; Akın, Serhat; Gücüyener, İsmail Hakkı; Department of Petroleum and Natural Gas Engineering (2016) A mathematical modeling work and computational fluid dynamics (CFD) analysis of surge and swab pressures in concentric annuli is conducted. A commercial CFD package is used to validate the developed model of the flow during surge and swab in concentric annuli. Developed mathematical model incorporates the Yield Power Law (YPL) fluid behavior for closed-end pipes under laminar flow conditions. The results of the mathematical model and CFD analysis is compared with the models from literature. CFD analysis is ...

Citation Formats

İ. O. Sert and N. Sezer Uzol, “Numerical analysis of convective heat transfer of nanofluids in circular ducts with two-phase mixture model approach,” Heat and Mass Transfer/Waerme- und Stoffuebertragung, vol. 52, no. 9, pp. 1841–1850, 2016, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84945585493&origin=inward.