TY - JOUR
T1 - Heat transfer performance of nano-suspension of Al 2 O 3 in ([C4mim][NT f2]) ionic liquid around a circular cylinder
AU - Rupesh, S.
AU - Deepak Selvakumar, R.
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2019/12/9
Y1 - 2019/12/9
N2 - IoNanofluids are a new category of heat transfer fluids synthesized by suspending fine nanoparticles in ionic liquids. These IoNanofluids show superior heat transfer characteristics than conventional nanofluids and are more suitable for medium to high temperature applications. In this study, a numerical analysis of heat transfer performance of nano-suspension of Al 2 O 3 in ([C4mim][NT f2]) ionic fluid around a circular cylinder has been presented. A 2-D, laminar, steady and forced convective flow around a hot circular cylinder at a constant temperature has been taken into account at 10 ≤ Re ≤ 40 and 0 % ≤ ≤ 2.5 %. Governing equations of flow and heat transfer are solved using SIMPLE algorithm based Finite Volume Method (FVM). An unique aspect of this study is the consideration of the influence of temperature on the thermo-physical properties of the IoNanofluids. Heat transfer characteristics are quantified in terms of mean Nusselt numbers and the thermal field around the circular cylinder has been visualized using isotherms. Influence of flow Reynolds number, particle volume fraction and inlet temperature over the local and mean Nusselt numbers has been discussed in detail. Evidently, increase in flow velocity and addition of nanoparticles resulted in heat transfer augmentation. Additionally, heat transfer performance of Al 2 O 3-([C4mim][NT f2]) IoNanofluid is compared with the conventional Al 2 O 3-H 2 O nanofluid. Comparatively, IoNanofluids outperformed conventional water based nanofluids with 59 % higher heat transfer enhancement ratios. Also, the heat transfer enhancement ratios were noted to be higher at high temperatures. Thus, the new class of cooling liquids (IoNanofluids) are promising working fluids for advanced real time high temperature engineering applications.
AB - IoNanofluids are a new category of heat transfer fluids synthesized by suspending fine nanoparticles in ionic liquids. These IoNanofluids show superior heat transfer characteristics than conventional nanofluids and are more suitable for medium to high temperature applications. In this study, a numerical analysis of heat transfer performance of nano-suspension of Al 2 O 3 in ([C4mim][NT f2]) ionic fluid around a circular cylinder has been presented. A 2-D, laminar, steady and forced convective flow around a hot circular cylinder at a constant temperature has been taken into account at 10 ≤ Re ≤ 40 and 0 % ≤ ≤ 2.5 %. Governing equations of flow and heat transfer are solved using SIMPLE algorithm based Finite Volume Method (FVM). An unique aspect of this study is the consideration of the influence of temperature on the thermo-physical properties of the IoNanofluids. Heat transfer characteristics are quantified in terms of mean Nusselt numbers and the thermal field around the circular cylinder has been visualized using isotherms. Influence of flow Reynolds number, particle volume fraction and inlet temperature over the local and mean Nusselt numbers has been discussed in detail. Evidently, increase in flow velocity and addition of nanoparticles resulted in heat transfer augmentation. Additionally, heat transfer performance of Al 2 O 3-([C4mim][NT f2]) IoNanofluid is compared with the conventional Al 2 O 3-H 2 O nanofluid. Comparatively, IoNanofluids outperformed conventional water based nanofluids with 59 % higher heat transfer enhancement ratios. Also, the heat transfer enhancement ratios were noted to be higher at high temperatures. Thus, the new class of cooling liquids (IoNanofluids) are promising working fluids for advanced real time high temperature engineering applications.
KW - Blu Body
KW - Heat Transfer
KW - Ionic Nanouids
KW - Thermal Stability
UR - http://www.scopus.com/inward/record.url?scp=85077891391&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/577/1/012004
DO - 10.1088/1757-899X/577/1/012004
M3 - Conference article
AN - SCOPUS:85077891391
SN - 1757-8981
VL - 577
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012004
T2 - International Conference on Advances in Materials and Manufacturing Applications 2018, IConAMMA 2018
Y2 - 16 August 2018 through 18 August 2018
ER -