Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

You are not logged in.

#1 Help Me ! » 4th order runge kutta » 2018-01-24 17:16:50

IbrahimGala
Replies: 0

Hi Guys
Hopefully I could find someone how has any idea about  4th order runge kutta method
I have 4 differential equations and I would like to use  4th order runge kutta method to numrically solve these equations
Equations are

Eq1 = -θ1 *x1*x2 +θ2*x3
Eq2 = -θ1 *x1*x2 + (θ2+θ3)*x3
Eq3= θ1 *x1*x2 - (θ2+θ3)*x3
Eq4 = θ3*x3


is there any one who can help me how to write down the 4th order runge kutta method for these equations

Thanks alot.

#2 Re: Help Me ! » 4th order runge kutta » 2018-01-24 16:50:40

can any one help me please
just to send me any referemce about this method and how it could be applied to an ODE model

Thanks

#3 Help Me ! » 4th order runge kutta » 2018-01-23 23:44:35

IbrahimGala
Replies: 1

Hi there
Hope some one could help me
I have a biochemical systems (ODE model) and I would like to use 4th order runge kutta method as a numerical soultion.

Just exaple.
dmdm2/dt = v3 +  v11 -v17
where
v3 = ksynMdm2*Mdm2_mRNA (ksynMdm2 is constant and Mdm2_mRNA  is a varibale)
v11 = krelMdm2p53* Mdm2_p53 (krelMdm2p53 is constant and Mdm2_p53 )
v17 = kphosMdm2 * Mdm2 *ATMA (kphosMdm2 is constant and Mdm2 and  ATMA are both variables)

I m just wondereing how I could write the method for this equation.

Hopefully it is clear what I need and Hopefully and I will get some help

Thansks a lot.

Board footer

Powered by FluxBB