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Thread: Ferrofluids in speakers: An experiment

  1. #1 Ferrofluids in speakers: An experiment 
    New Member
    Join Date
    Aug 2010
    Hey guys, I'm kind of new here but I might as well jump right into it. I'm preparing to do an experiment on Ferrofluid as a coolant, specifically in speakers (voice coils). From what I've read, larger speakers use Ferrofluid to cool the voice coil, which is magnetically induced I assume, using the concept that magnetic strength is inversely proportional to temperature (Curie's Law). I'm not sure how this would work though. Of course the cooler fluid would sink and the heated fluid would rise, and the heated fluid would be less magnetically susceptible. Then the heat is somehow displaced by either dispersing over an area or into a heat sink.

    What I want to find is how it could be applied in other areas as a coolant, so I'm going to have to experiment the Ferrofluid's heat capacity and how it displaces the heat generated by an object immersed in it/surrounded by it, which brings me to the question, how is the heat dissipated from the Ferrofluid? How does Curie's Law tie into all of this? I have no clue about the workings of a heat sink, so perhaps someone would like to enlighten me on that subject as well! Of course I could be completely wrong and find that Ferrofluid simply cools objects much faster than other mediums and has nothing to do with it's magnetic susceptibility! That would be extremely disappointing!

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