Numerical simulation of thermomagnetic convection of cold water near its density maximum in a square enclosure under a magnetic quadrupole field

作者：Shi, Er; Sun, Xiaoqin; He, Yecong; Jiang, Changwei^*

来源：Fluid Dynamics Research, 2017, 49(3): 035505.

DOI：10.1088/1873-7005/aa6588

• thermomagnetic convection
• diamagnetic fluid
• density maximum
• magnetic quadrupole field
• numerical simulation

Natural convection of cold water near its density maximum in a square enclosure is studied numerically under the influence of a magnetic quadrupole field without gravity. A generalized model which includes a non-Boussinesq parabolic density-temperature relationship is established. The governing equations in primitive variables are discretized using the finite-volume method and solved using the SIMPLE algorithm. The effects of magnetic force number, Rayleigh number and density inversion parameter on flow and heat transfer characteristics are analyzed. The results show that the primary flow pattern depends mainly on the density inversion parameter. Multi-cellular flow structures are observed for certain ranges of density inversion parameter independent of the value of Rayleigh number and magnetic force number. The heat transfer changes non-monotonically under combined actions of the quadrupole magnetic field and density inversion.

• 出版日期2017-6
• 单位长沙理工大学