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Chapter VII. Wave flume
VII.1. Introduction
The wave flume is an important tool in coastal engineering research, allowing for the creation of
scaled-down models that simulate the characteristics of natural waves. In this chapter, we study
the first order wave generation theory, which serves as the foundation for understanding wave
generation in wave flumes. By exploring the principles behind wavemaker design and operation,
we can gain valuable insights into the behavior of waves and their impact on coastal areas.
VII.2. 2D Waves generator
we focus on the 2D problem of wave propagation in a wave flume. the latter is a controlled
laboratory setting where researchers investigate wave characteristics and their interactions with
different structures. By studying the 2D problem, we aim to understand the fundamental
principles that govern wave behavior in a simplified yet representative environment. For further
information, refer to the book "Physical Models and Laboratory Techniques in Coastal
Engineering" (Steve,1993).
VII.2.1. Description of the Flap-Type Wavemaker
The flap-type wavemaker is a commonly employed configuration in wave flumes for precise
wave generation. It consists of a wave board (flap) positioned at one end of the flume, which
rotates around a pivot point. The flap's motion is controlled by an actuator system, typically
comprised of hydraulic or electric motors and linkages. This scheme allows for the generation of
waves with specific amplitudes, frequencies, and shapes by manipulating the motion of the flap.
The flap shape minimizes disturbances in the water, ensuring efficient wave generation. Through
careful calibration and adjustment of parameters, such as flap motion amplitude and speed, the
flap-type wavemaker can simulate a wide range of wave conditions, making it a versatile tool for
coastal engineering research. In the following, we will refer to the sketch shown in Figure VII-1.
The flap-type wavemaker assumes a sinusoidal motion for the wave board, given by Equation
VII-1.
í µí± 0 = í µí±(0, í µí±¡) =
í µí± 0
2
sin (í µí¼í µí±¡)
Equation VII-1
Chapter VII. Wave flume
VII.1. Introduction
The wave flume is an important tool in coastal engineering research, allowing for the creation of
scaled-down models that simulate the characteristics of natural waves. In this chapter, we study
the first order wave generation theory, which serves as the foundation for understanding wave
generation in wave flumes. By exploring the principles behind wavemaker design and operation,
we can gain valuable insights into the behavior of waves and their impact on coastal areas.
VII.2. 2D Waves generator
we focus on the 2D problem of wave propagation in a wave flume. the latter is a controlled
laboratory setting where researchers investigate wave characteristics and their interactions with
different structures. By studying the 2D problem, we aim to understand the fundamental
principles that govern wave behavior in a simplified yet representative environment. For further
information, refer to the book "Physical Models and Laboratory Techniques in Coastal
Engineering" (Steve,1993).
VII.2.1. Description of the Flap-Type Wavemaker
The flap-type wavemaker is a commonly employed configuration in wave flumes for precise
wave generation. It consists of a wave board (flap) positioned at one end of the flume, which
rotates around a pivot point. The flap's motion is controlled by an actuator system, typically
comprised of hydraulic or electric motors and linkages. This scheme allows for the generation of
waves with specific amplitudes, frequencies, and shapes by manipulating the motion of the flap.
The flap shape minimizes disturbances in the water, ensuring efficient wave generation. Through
careful calibration and adjustment of parameters, such as flap motion amplitude and speed, the
flap-type wavemaker can simulate a wide range of wave conditions, making it a versatile tool for
coastal engineering research. In the following, we will refer to the sketch shown in Figure VII-1.
The flap-type wavemaker assumes a sinusoidal motion for the wave board, given by Equation
VII-1.
í µí± 0 = í µí±(0, í µí±¡) =
í µí± 0
2
sin (í µí¼í µí±¡)
Equation VII-1