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Euler–Tricomi equation
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In mathematics, the Euler–Tricomi equation is a linear partial differential equation useful in the study of transonic flow. It is named after mathematicians Leonhard Euler and Francesco Giacomo Tricomi.
It is elliptic in the half plane x > 0, parabolic at x = 0 and hyperbolic in the half plane x < 0. Its characteristics are
which have the integral
where C is a constant of integration. The characteristics thus comprise two families of semicubical parabolas, with cusps on the line x = 0, the curves lying on the right hand side of the y-axis.
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Particular solutions
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A general expression for particular solutions to the Euler–Tricomi equations is:
where
These can be linearly combined to form further solutions such as:
for k = 0:
for k = 1:
etc.
The Euler–Tricomi equation is a limiting form of Chaplygin's equation.
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See also
Bibliography
- A. D. Polyanin, Handbook of Linear Partial Differential Equations for Engineers and Scientists, Chapman & Hall/CRC Press, 2002.
External links
- Tricomi and Generalized Tricomi Equations at EqWorld: The World of Mathematical Equations.
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