Impact of Magnetic Field on Thermal Convection in a Linearly Heated Porous Cavity

2019 ◽  
pp. 503-522
Author(s):  
Aakash Gupta ◽  
Sayanta Midya ◽  
Nirmalendu Biswas ◽  
Nirmal K. Manna
Keyword(s):  
Magnetic Field ◽  
Thermal Convection ◽  
Porous Cavity

Experiments on the inhibition of thermal convection by a magnetic field

1957 ◽  
Vol 240 (1220) ◽  
pp. 108-113 ◽  
Keyword(s):  
Magnetic Field ◽  
Electrical Conductivity ◽  
Rayleigh Number ◽  
Magnetic Fields ◽  
Thermal Convection ◽  
Kinematic Viscosity ◽  
Critical Rayleigh Number ◽  
Theoretical Relation ◽  
Horizontal Layers

Experiments on the magnetic inhibition of thermal convection in horizontal layers of mercury heated from below are described. A large 36½ in. cyclotron magnet reconditioned for hydromagnetic studies was used in these experiments. By using layers of mercury of depth 3 to 6 cm and magnetic fields of strength 500 to 8000 gauss, it has been possible to determine the dependence of the critical Rayleigh number for the onset of instability on the parameter Q 1 ( = σH 2 d 2 / π 2 ρν , where H denotes the strength of the field, σ the electrical conductivity, ν the coefficient of kinematic viscosity, ρ the density and d the depth of the layer) for Q 1 varying between 40 and 1·6 × 10 6 . The experiments fully confirm the theoretical relation derived by Chandrasekhar.

Simulation of natural convection of Fe3O4-water ferrofluid in a circular porous cavity in the presence of a magnetic field

2019 ◽  
Vol 134 (2) ◽  
Author(s):  
Zhixiong Li ◽  
Ahmad Shafee ◽  
M. Ramzan ◽  
H. B. Rokni ◽  
Qasem M. Al-Mdallal
Keyword(s):  
Magnetic Field ◽  
Natural Convection ◽  
Porous Cavity
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