Specific heat of magnetic fluids under a modulated magnetic field

Abstract

Articles you may be interested inQuasi-static magnetic measurements to predict specific absorption rates in magnetic fluid hyperthermia experiments Due to the increasing importance of thermal devices in engineering applications, the investigation of the thermal properties of magnetic fluids has become necessary. In this work, we report both the temperature and field dependence of the specific heat of a water-based magnetic fluid. The results show that the specific heat of the magnetic fluid is almost independent of temperature under lower-field strengths ͑Ͻ50 Oe͒, but decreases significantly upon increasing temperature under higher fields. To clarify this effect of the magnetic field on the specific heat capacity of the magnetic fluid, the evolution of the structure of the magnetic fluid film is examined and compared with its field-modulated heat capacity of the fluid.

The magnetic-nanofluid heat pipe with superior thermal properties through magnetic enhancement

“…The specific field increased, whereas the concentration was lower [ 8 ]. Because of the formation of magnetic clusters, C MNF decreased with H s, becoming smaller than 300 Oe [ 14 ]. Because the origin of mechanism is the same as that of k MNF , there was possibly an optimal value for the variation of C MNF with H s. This was valid for other H -dependent optical properties of MNFs based on this mechanism [ 15 ].…”

“…In WF temperature, k MNF decreased as the temperature rose [ 16 ], but k W almost remained the same [ 17 ]. Similarly, C MNF decreased slightly as the temperature rose, but C W almost remained the same [ 14 ]. Effectively, k MNF C W / k W C MNF is smaller at high temperatures than at low temperatures if the effect of C MNF is smaller than that of k MNF .…”