ODE/DAE Solver

This demonstration version has a simple built in model example:
dx/dt = 1 - x ; x(0) = 0
y = x² + z; z = 0.1

You can of course change these.

Model Input Section

Notes Data Input

Variables

Enter names of variables separated by commas. Variable names must consist of alphanumeric characters (a-z, 0-9), and the underscore character(_). Variable names are case sensitive. Certain words are reserved, and may not be used as variable names. These are:
  • Time
  • Tmax
  • DeltaT

Parameters

Enter parameters together with their value opposite, separated by either semi-colons or new lines. Parameters are "variables" whose value is constant, and thus have the same restrictions on what their names are composed of.

Algebraic equations:

Remember that these must be separated by semicolons, and have only a single variable on the left hand side of the equals sign.

Differential equations:

Differential variables are written as a.dt, (for da/dt)where a is the dependant variable, and t the independant variable

Initial Conditions and Equations

An initial value is required for each ODE variable:

Schedule

Change as appropriate. These are only required for equation sets containing differential equations.
Timestep:
Maximum Time :


Jack Ponton
J.W.Ponton@ed.ac.uk
Last modified Sep 14 2001