Research on convective heat transfer characteristics of Fe3O4 magnetic nanofluids under vertical magnetic field

Abstract

This paper focuses on the convective heat transfer characteristics of Fe3O4 /Water magnetic nanofluids under laminar and turbulent conditions. After verifying the accuracy of the experimental apparatus, the effects of magnetic field strength, concentration, Reynolds number and temperature on the convective heat transfer coefficient have been studied. The convective heat transfer characteristics of nanofluids under laminar and turbulent flow conditions were studied in depth, and the influence of each factor on the heat transfer coefficient was analyzed by orthogonal experimental design method. Under the laminar flow conditions, the convective heat transfer of magnetic nanofluids performed best when the Reynolds number was 2000, the magnetic field strength was 600, the temperature was 30? and the concentration was 2%. And the convective heat transfer coefficient (h) increased by 3.96% than the distilled water in the same conditions. In turbulent state, the convective heat transfer of magnetic nanofluids performed the best when the Re was 6000, the magnetic field strength was 600, the temperature was 40? and the concentration was 2%. The h increased by 11.31% than the distilled water in the same Reynolds number and the magnetic field strength conditions.

RANCANGAN HEAT EXCHANGER JENIS SHELL AND TUBE UNTUK PRODUKSI NANOPARTIKEL Fe3O4 SKALA INDUSTRI

“…Terdapat banyak jenis nanopartikel yang penting untuk digunakan dalam kehidupan industri, salah satu jenis nanopartikelnya adalah Fe3O4. Nanopartikel Fe3O4 umumnya digunakan untuk memproduksi nanofluida biomedis untuk beberapa aplikasi seperti pemberian obat dan terapi kanker [1]. Penelitian mengenai sintesis Fe3O4 menggunakan sistem heat exchanger pada skala industri masih jarang ditemukan [2].…”

Systematic preparation and physical property characterization of a novel stable BiOIO3 nanofluids

“…Nanofluids are two-phase fluids in which solid nanoparticles are immersed in the base fluid and their thermal conductivity can be enhanced by the mixing to improve the heat transfer performance of conventional fluids [1][2]. In the previous decade, nanofluids have achieved considerable devotion and become a research hotspot due to their enhanced thermal conductivities [3].…”