19. Introduction to wave mechanics (Contd.)
The chapter delves into the fundamentals of wave mechanics, focusing on boundary conditions related to fluid dynamics, including bottom and free surface conditions. It explores various cases, such as horizontal and sloping bottoms, and introduces the concepts of dynamic boundary conditions, kinematic conditions, and their mathematical implications in fluid dynamics. Finally, it outlines assumptions necessary for applying Bernoulli's equations to derive velocity potentials.
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Sections
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What we have learnt
- Bottom boundary conditions are crucial for understanding the behavior of fluid flow near fixed surfaces.
- Dynamic surface boundary conditions account for the pressure variations across free surfaces and are essential in wave mechanics.
- Irrotational flow assumptions lead to the Laplace equation being applicable for deriving fluid potential functions.
Key Concepts
- -- Bottom Boundary Condition
- A condition where the bottom surface of a fluid is fixed, ensuring zero vertical velocity component at that level.
- -- Dynamic Free Surface Boundary Condition
- A condition that states the pressure on the free surface of the fluid must be uniform, particularly relevant in wave analysis.
- -- Kinematic Boundary Condition
- A boundary condition for fluid flow that relates the displacement of the fluid surface to its velocity components.
- -- Laplace Equation
- The governing equation derived from the assumptions of potential flow, stated as delta squared phi = 0.
- -- Velocity Potential
- A scalar function from which the velocity components of an ideal fluid flow can be derived, particularly useful in wave mechanics.
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