c-abird / yamms_js

A JavaScript interface to yamms_core

YammsJs

YammsJs is a JavaScript interface to the YammsCore

Build and Run

• Make shure you have an up-to-date yamms_core.jar in your lib folder
• Run ant to build a runnable jar file.
• Create a run.js project file (See next section)
• Run java jar dist/bin/yamms_js.jar -c run.js

Solving the muMag standard problem 4:

The standard problem 4 as defined by the muMag group could be simulated by the following:

run.js

var project = new SimpleProject() {
  startSimulation: function(params) {
    // Load the initial magnetization
    var m = OmfFileService.readFile("sp4.omf");

    // Set the spatially constant saturation magnetization
    var ms = RealScalarField.getUniformField(m.topology, 8e5);

    // Set up the constituents of the effective field
    var field = new CompositeFieldTerm();
    field.addFieldTerm(new ExchangeField(13e-12, ms));
    field.addFieldTerm(new DemagField(m.topology));
    field.addFieldTerm(new StaticZeemanField([
      -24.6e-3 / Constants.MU0, 
      4.3e-3 / Constants.MU0,
      0
    ]));

    // Set up the model (the LLG)
    var model = new BasicModel(2.211e5, 0.02, ms, field);
    
    // Set up the solver (time integrator)
    var solver = new DormandPrinceSolver(0, 1e-10, 1, 1e-4);

    // Register storage handlers
    solver.addHandler(new OmfStorageHandler("./omf", ""), 50);
    solver.addHandler(new ScalarStorageHandler("table"), 10);

    // Start the simulation
    solver.integrate(model, m, 1e-9);
  }
};

Copyright (C) 2009-2010 Claas Abert

Distributed under the LGPL. See LICENSE file.