NUMERICAL STUDY OF THERMAL CHARACTERISTICS OF FUEL OIL-ALUMINA AND WATER-ALUMINA NANOFLUIDS FLOW IN A CHANNEL IN THE LAMINAR FLOW

Hossein Fatahian; Hesamoddin Salarian; Majid Eshagh Nimvari; Esmaeel Fatahian

doi:10.31436/iiumej.v19i1.857

Authors

Hossein Fatahian Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran
Hesamoddin Salarian Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran
Majid Eshagh Nimvari Faculty of Engineering, Amol University of Special Modern Technologies, Mazandaran, Iran
Esmaeel Fatahian Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran

DOI:

https://doi.org/10.31436/iiumej.v19i1.857

Abstract

The present study investigated the thermal effects of the use of nanoparticles in the fuel-oil and water-based fluids, as well as the numerical simulation of laminar flow of fuel-oil-alumina and the water-alumina nanofluids in a channel. A second order discretization method was used for solving equations and a SIMPLE algorithm was applied for pressure-velocity coupling using Fluent. Effect of nanoparticle volume fraction and particles size in different Reynolds numbers (900â‰¤Reâ‰¤2100) on the convective heat transfer coefficient was studied. The simulation was conducted for three different volume fractions and particle sizes in the laminar flow under constant heat flux. The results showed that adding nanoparticles to the base fluid caused an increase in the thermal conductivity ratio of the fluid, which was observed to a greater degree in the fuel oil-alumina nanofluid than in the water-alumina nanofluid. The increase in nanoparticle volume fraction caused an increase in the convective heat transfer coefficient and the Nusselt number of the nanofluids. The significant point of this study was that in the same volume fraction, the effect of adding alumina nanoparticles to the fuel-oil-based fluid had more effect than adding these particles to water-based fluid, while the effect of increasing the Reynolds number in the water-alumina nanofluid on convective heat transfer coefficient was greater than the fuel-oil-alumina. Also, in the same Reynolds number and volume fraction with increasing size of nanoparticles, the value of the convective heat transfer coefficient was decreased. The results of this study can be used in refineries and petrochemical industries where the fuel-oil fluid flows in the channels.

ABSTRAK: Kajian ini adalah bagi mengkaji kesan haba terhadap penggunaan bahan bakar-minyak dan cecair asas-air dalam nanopartikel, juga menjalankan simulasi pengiraan aliran laminar bahan bakar-minyak-alumina dan cecair-nano air-alumina dalam saluran. Kaedah berasingan kelas kedua telah digunakan bagi menyelesaikan persamaan dan algoritma SIMPLE telah diaplikasikan dalam gandingan kelajuan-tekanan menggunakan Fluent. Kesan jumlah pecahan nanopartikel dan pelbagai bilangan saiz zarah dalam bilangan Reynolds (900â‰¤Reâ‰¤2100) pada pekali pemindahan haba perolakan telah dikaji. Simulasi telah dijalankan pada tiga pecahan isipadu berlainan dan pada zarah dalam aliran laminar dengan fluks haba tetap. Hasil kajian menunjukkan bahawa dengan penambahan nanopartikel dalam cecair-asas menyebabkan peningkatan nisbah daya pengaliran haba cecair pada cecair-nano bahan bakar-minyak-alumina melebihi daripada cecair-nano air-alumina. Penambahan pada pecahan isipadu nanopartikel ini menyebabkan peningkatan pada nilai pekali pemindahan haba perolakan dan bilangan Nusselt dalam cecair-nano. Perkara penting dalam kajian ini adalah pada pecahan isipadu sama, kesan penambahan nanopartikel alumina kepada cecair berasaskan minyak mempunyai kesan yang lebih besar daripada penambahan zarah-zarah ini kepada cecair berasaskan air. Pada masa sama, kesan peningkatan bilangan Reynolds dalam cecair-nano air-alumina pada pekali pemindahan haba perolakan lebih besar daripada kesan peningkatan bahan bakar-minyak-alumina. Selain itu, pada bilangan Reynolds yang sama dan dengan peningkatan saiz nanopartikel pecahan isipadu, nilai pekali pemindahan haba perolakan turut menurun. Hasil kajian ini boleh digunakan dalam industri penapisan dan petrokimia di mana bahan bakar cecair minyak mengalir dalam saluran.

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Author Biographies

Hossein Fatahian, Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran

PhD student, Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran

Hesamoddin Salarian, Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran

Assistant professor, Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran

Majid Eshagh Nimvari, Faculty of Engineering, Amol University of Special Modern Technologies, Mazandaran, Iran

Assistant Professor, Faculty of Engineering, Amol University of Special Modern Technologies, Mazandaran, Iran

Esmaeel Fatahian, Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran

PhD student, Department of Mechanical Engineering, Nour Branch, Islamic Azad University, Mazandaran, Iran

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