Recent content by rph

  1. R

    Runge-Kutta for gravitational N-Body simulation - prediction of acceleration

    Thank you again for your input. I'll try out Runga-Kutta-Fehlberg. Can you recommend me a textbook I could look up in our library covering numerical methods applied to physical problems in general, or, if no such book exists you enjoyed reading, a textbook about methods for numerical...
  2. R

    Runge-Kutta for gravitational N-Body simulation - prediction of acceleration

    Excellent, thank you very much! That's actually what I implemented :D -- but it felt kind of wrong, as in the textbooks I studied the four slopes are always given at once, and I thought there would have to be another "trick" to predicht the other object's state. Well, thank you again!
  3. R

    Runge-Kutta for gravitational N-Body simulation - prediction of acceleration

    Thank you for your reply, AlephZero! I hope I got you right but of course, I converted the 2nd order diff. eq. into two 1st order diff eq. :-) The part I don't understand is the following: The acceleration a is function of the time -- as the objects of the system are in motion. To...
  4. R

    Runge-Kutta for gravitational N-Body simulation - prediction of acceleration

    Runge-Kutta for gravitational N-Body simulation - "prediction" of acceleration Hey! I'm Raph, as you can see this is my first post, so, thus I'll start saying that it's nice to be here ;). I've got the following question: I'm simulating a system of N gravitationally interacting objects...