Can a Nonlinear DE with Constant Coefficients be Solved Analytically?

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Discussion Overview

The discussion revolves around the analytical and approximate methods for solving a specific nonlinear differential equation with constant coefficients. The equation involves a function Ts of time t and is derived from the heat diffusion equation. Participants explore various techniques and approaches to tackle the problem.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Homework-related

Main Points Raised

  • Michele presents a nonlinear differential equation and requests assistance in solving it analytically and through approximate methods, noting the initial condition Ts(0)=Ti.
  • One participant emphasizes the need for Michele to show their work before receiving help, suggesting that a technique learned in calculus could be applicable.
  • Michele mentions that the equation results from integrating the heat diffusion equation and inquires about methods to linearize it.
  • Another participant argues that the absence of 't' in the differential equation implies a straightforward approach to solving it, hinting at a simpler solution than numerical methods.

Areas of Agreement / Disagreement

Participants express differing views on the methods to solve the equation, with no consensus reached on the best approach or whether linearization is necessary.

Contextual Notes

The discussion does not clarify the assumptions underlying the proposed methods or the specific conditions under which they may apply. There is also no resolution on the effectiveness of linearization for the given equation.

mike79
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dear friends,
i need to solve analitically(also by means of approximate methods) the following nonlinear differential equation:
(A+BTs^(3))*dTs/dt+C*Ts^(4)=D

where Ts is a function of t. A, B, C and D are costants. the initial condition is Ts(0)=Ti.
I would be so grateful if anyone can help me.

Regards
Michele
 
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You need to show your work first, that's how it works on this forum.

I will give you a hint anyway-- you can solve it using a technique you learned in calculus! It's that simple (that gave it away since you probably only learned that one method to solve de's when you were in calc).
 
the mentioned equation is the result of the integration of the heat diffusion eqaution following the approximate integral method. is it possible to use any methods to linearize this equation?
 
As DavidWhitBeck said, you don't have to resort to any fancy numerical methods at all. You're given a differential equation for which 't' does not appear at all, only Ts(t). What does that tell you about how to solve it?
 

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