We know that magnetism can affect heat transport. Consider a forced convection problem where the heating fluid is water-based magnetite (Fe3O4) nanofluids. Fe3O4 nanoparticles have strong magnetic properties, so I wonder if these particles can control the heat flow? Is there any relationship between heat flow and magnetic interaction between nano-sized particles?
Thermal conductivity and viscosity are directly related (think of the Einstein relation), and both are dependent on the nature of the interaction between the constituent particles. For orientation, consult Chapter 5 of [1]. In this chapter, dealing with transport phenomena from the perspective of the Boltzmann equation, the effect of particle-particle interaction is subsumed in the total scattering cross-section σtot, which in turn is replaced by πa2, where a stands for the molecular diameter (so, here classical particles interacting through an effective hard-core potential are taken into account [2]). In your case, one needs to go through a similar procedure, appropriately taking account of the magnetic interaction between the nanoparticles.
[1] K. Huang, Statistical Mechanics, 2nd edition (John Wiley & Sons, New York, 1987).
[2] For the case of particles interacting through a Lennard-Jones potential, consult the following paper by Lemmon and Jacobsen:
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Hi
Yes... There is a correlation between heat flow and magnetic attraction.... The induced heat may active the curie transition in materials.
Best
Arunprakash Vincent
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