desperate, please help.
- To: mathgroup at smc.vnet.net
- Subject: [mg27355] desperate, please help.
- From: thjqase at aol.com (Thjqase)
- Date: Wed, 21 Feb 2001 03:18:06 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
I need help numerically solving a differential equation coupled with several
algebraic equations. New to Mathematica. Here's code:
NDSolve[{v'[x] == -F÷r, T[x] == 330 + 43.3*x, F = .9*163, C == 9.3,
k[x] == 31.1Exp(7906*(T - 360)/(T*360))
, K[x] == 3.03*Exp(-830.3*((T - 333)/(T*333))),
r[x] == -k*C*(1 - (1 + 1/K)*x),
v[0] == 0}, {v}
, {x, 0, .7}]
Error code is:
NDSolve::"deql": "The first argument must have both an equation and an \
initial condition."
Any suggestions? What am I doing wrong? My head is sore from banging it against
the wall.
TIA.