Minguillan Posted August 28, 2015 Share Posted August 28, 2015 We can see here how the ferrofluid changes its patterns due to the influence of one or two magnets: 1 Link to comment Share on other sites More sharing options...
Sensei Posted August 28, 2015 Share Posted August 28, 2015 I see it's yours video. So how about making couple tests? f.e. instead of using permanent magnet, use electromagnet and variable resistor to control amount of current flowing through coil. The higher current, the stronger electromagnet. Then change polarization by swapping + and - in DC. How about using small frequency AC for electromagnet (current will be flowing once in one direction, then in other, and it'll be changing polarization of electromagnet). How about using wire through which current is flowing and surrounding container with ferrofluid.. ? So it'll be kinda like core in electromagnet. Did you try if your fluid is passing current.. ? Link to comment Share on other sites More sharing options...
Minguillan Posted August 29, 2015 Author Share Posted August 29, 2015 Well, I didn't yet try to use an electromagnet with this ferrofluid. I have an idea about to dismount an speaker to bring closer the ferrofluid and to use a periodical acoustical signal, e.g. using Audacity. It is not possible to open the bottle for safety reasons. When I have a ferrofluid that I can measure I will try to measure its conductivity. I mean to buy only the ferrofluid, not the complete kit that I have with magnets and bottle with ferrofluid and the other transparent liquid. Link to comment Share on other sites More sharing options...
swansont Posted August 29, 2015 Share Posted August 29, 2015 ! Moderator Note Rule 2.7 says, in part: Links, pictures and videos in posts should be relevant to the discussion, and members should be able to participate in the discussion without clicking any links or watching any videos. Videos and pictures should be accompanied by enough text to set the tone for the discussion, and should not be posted alone. Please don't post just to advertise your youtube channel. Link to comment Share on other sites More sharing options...
Natures Student Posted October 9, 2016 Share Posted October 9, 2016 (edited) Well, I didn't yet try to use an electromagnet with this ferrofluid. I have an idea about to dismount an speaker to bring closer the ferrofluid and to use a periodical acoustical signal, e.g. using Audacity. It is not possible to open the bottle for safety reasons. When I have a ferrofluid that I can measure I will try to measure its conductivity. I mean to buy only the ferrofluid, not the complete kit that I have with magnets and bottle with ferrofluid and the other transparent liquid. I'll save you the trouble. It's not conductive. While the principle material is a form of iron-oxide, they are nano particles that do not touch each other. The reason is they are encapsulated in surfactants that allow the iron to remain in suspension within the oil distillate that comprises most of the fluid. Edited October 9, 2016 by swansont Fix quote tag Link to comment Share on other sites More sharing options...
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