{"id":4595,"date":"2024-07-12T13:28:57","date_gmt":"2024-07-12T18:28:57","guid":{"rendered":"https:\/\/commons.princeton.edu\/josephhenry\/?page_id=4595"},"modified":"2024-07-25T14:29:20","modified_gmt":"2024-07-25T19:29:20","slug":"magnet-through-copper-tube-w-moving-mesh-comsol","status":"publish","type":"page","link":"https:\/\/commons.princeton.edu\/josephhenry\/comsol\/magnet-through-copper-tube-w-moving-mesh-comsol\/","title":{"rendered":"Magnet Through Copper Tube w\/ Moving Mesh"},"content":{"rendered":"

Tesla Pratt, 6\/12\/24 — <\/span>Professor Littman<\/span><\/p>\n

Objective<\/strong>: Create a magnet that moves up and down inside a copper tube <\/span>using a moving mesh<\/b> and successfully <\/span>plot current density<\/b>.\u00a0<\/span><\/p>\n

Selected Space Dimension: 2D Asymmetric<\/span><\/p>\n

Results: <\/strong>Using components of COMSOL\u2019s <\/span>Magnet Falling Through Copper Tube<\/span><\/a> and <\/span>Voltage Induced in a Coil by a Moving Magnet<\/span><\/a> I was able to successfully apply moving meshes to the Magnetic Fields(mf) workspace.<\/span><\/p>\n

3D and 2D Current Density Plots<\/strong><\/p>\n

\"\"\"\"\"\"<\/p>\n

Link to my model: Compressed COMSOL 6.2 file – 2D Moving Mesh<\/a><\/p>\n

As shown above, as the magnet moves up and down inside of a metal tube, eddy currents are induced in the material surrounding the magnet. Eddy Currents occur when there are changing magnetic fields next to a solid body.\u00a0<\/span><\/p>\n

Process:<\/strong><\/p>\n

    \n
  1. Open up the <\/span>Voltage Induced in a Coil by a Moving Magnet<\/span><\/a> mph file<\/span><\/li>\n
  2. Replace the Coil for a Copper Tube<\/span>\n
      \n
    1. Find the \u201cMagnetic Fields (mf<\/em>)\u201d section in the Model Builder window.<\/span><\/li>\n
    2. Delete \u201cCoil 1\u201d<\/span><\/li>\n<\/ol>\n<\/li>\n
    3. Assigning Ampere\u2019s law to the copper tube<\/span>\n
        \n
      1. Right click on \u201cMagnetic Fields (mf<\/em>)\u201d and click \u201cAmpere\u2019s Law in Solids\u201d<\/span><\/li>\n
      2. Select the copper tube component\u00a0<\/span><\/li>\n
      3. In the Label section, change the title to \u201cAmpere\u2019s Law Copper Tube\u201d<\/span><\/li>\n<\/ol>\n<\/li>\n
      4. Assigning Ampere\u2019s law to the magnet<\/span>\n
          \n
        1. Create another \u201cAmpere\u2019s Law in Solids\u201d<\/span><\/li>\n
        2. Select the magnet in the selection window<\/span><\/li>\n
        3. Find \u201cMagnetization Model\u201d in the settings window<\/span><\/li>\n
        4. In the dropdown, select \u201cRemanent Flux Density\u201d<\/span><\/li>\n
        5. Make sure \u201cRemanent Flux Direction\u201d is in the Z direction<\/span><\/li>\n
        6. In the Label section, change the title to \u201cAmpere\u2019s Law Magnet\u201d<\/span><\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

          \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

          Tesla Pratt, 6\/12\/24 — Professor Littman Objective: Create a magnet that moves up and down inside a copper tube using a moving mesh and successfully plot current density.\u00a0 Selected Space Dimension: 2D Asymmetric Results: Using components of COMSOL\u2019s Magnet Falling Through Copper Tube and Voltage Induced in a Coil by a Moving Magnet I was … Continue reading “Magnet Through Copper Tube w\/ Moving Mesh”<\/span><\/a><\/p>\n","protected":false},"author":6121,"featured_media":0,"parent":4283,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-4595","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages\/4595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/users\/6121"}],"replies":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/comments?post=4595"}],"version-history":[{"count":9,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages\/4595\/revisions"}],"predecessor-version":[{"id":4789,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages\/4595\/revisions\/4789"}],"up":[{"embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/pages\/4283"}],"wp:attachment":[{"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/media?parent=4595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/categories?post=4595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commons.princeton.edu\/josephhenry\/wp-json\/wp\/v2\/tags?post=4595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}