Magnetic field and internal heat generation effects on the free convection in a rectangular cavity filled with a porous medium

Numerical Investigation on Heat and Flow Characteristics of Temperature-Sensitive Ferrofluid in a Square Cavity

“…In addition, the heat transfer of the ferrofluid in the tested cavity under magnetic intensity ( = 15000 A/m) increased greatly with the rise of the magnetic volume fractions from 1.2% (FF1) to 4.5% (FF4) due to the increased heat transfer. Namely, this is because the diffusive concentration gradients lead to the coupling effect between heat and mass transport as mentioned in Rinaldi et al [2] Also, the presence of the magnetic intensity tends to accelerate the fluid motion inside the tested cavity as mentioned in Grosan et al [27]. Figure 6 shows the effect of the isotherms and mean Nusselt numbers on the temperature difference between top and bottom walls of the tested cavity under the elapsed time of = 10000 seconds, magnetic intensity of = 15000 A/m, and magnetic volume fractions of 2.0% (FF2).…”

Thermophysical Characteristics of the Ferrofluid in a Vertical Rectangle

“…Also the mean Nusselt number of the ferrofluid with the volume fraction of 4.5% at H = 3000 A/m is 15.84% larger than that with the volume fraction of 1.5% because the magnetic volume force of the ferrofluid increased with the increase of the ferrofluid volume fractions [21]. The cooling area at the isotherms of the ferrofluid in the vertical rectangle increased with the increase of the magnetic volume fractions and magnetic field intensities due to increasing of the cooling speed with increased magnetic volume force [22]. Namely, the ferrofluid with more magnetite content yields a higher heat transfer.…”

Heat Generation Effects on Natural Convection in Porous Cavity With Different Walls Temperature

“…To ensure of the accuracy of this program, the results have been compared in special case in presented work by Grosan et al (2009 Ψ and θ max are also given in Table 1. Small difference between the results is due to different approximation and different convergence criteria during the solving process.…”

“…Chamkha et al (2002) studied a porous cavity that is exposed to radiation heat transfer. Grosan et al (2009) investigated the effects of magnetic field and heat generation on porous cavity and they presented results for effect of Ra and Ha number in heat transfer of cavity. Ha is a parameter that depends to magnetic field intensity.…”