You an get many example online if you searched for "solving ODE using Simulink" and even videos like this: http://www.youtube.com/watch?v=o5EB03L534Y.

But the equations are solved in s-domain in simulink and for that reason you have to use the integrator block (1/s) to represent the integration.

Finally, make sure of the initial conditions of each block (1/s).

Try to search for "van der pol" equation solution in simulink because it is widely used in ode tutorials using simulink.

Regards

An example model of Lotka–Volterra equation:

http://gknor.keep.pl/simulink/lotka_volterra.rar

Dear Sanjay,

You can do it very easily in Simulink. To explain it I am giving you a link that I found very helpful.

http://www.swarthmore.edu/NatSci/echeeve1/Ref/Matlab/Simulink/SimulinkForODE/SimulinkForODE.html

http://blanchard.ep.wisc.edu/simulink/UsingSimulink.pdf