Disclosed herein is an experimental system for measuring wave force. The experimental system includes a wave force measurement apparatus (100), a load calculation unit (200) and a display unit (300). The wave force measurement apparatus includes: a wave generation tank (110) that contains water therein and forms a water channel; a wave generator (120) generating a wave in the water contained in the wave generation tank; and a wall (150) disposed in the wave generation tank and provided with wave manometers (190) and load transducers (140). The load calculation unit (200) adds up pressures of the wave measured by the wave manometers and loads of the wave measured by the load transducers and calculates a load of the wave applied to a surface of the wall. The display unit (300) indicates a result value calculated by the load calculation unit to an experimenter.

This document discusses, among other things, systems, devices and methods for fluid flow analysis for example, in an education environment. The light source, for example, a laser, is housed to illuminate particles in a fluid while minimizing exposure to the user. A control unit is provided that is remote from the fluid flow device. The fluid flow device further includes a removable fluid obstacle such that different fluid flow effects can be obtained. A computational unit is provided to perform computational fluid flow dynamics analysis on fluid flow models. The computed data can then be compared to the test data from the fluid flow analysis device.

A computer simulation of bubbles enveloping a ship is performed by a. calculating a turbulent flow energy and an energy loss caused by an energy dissipation factor as well as an average fluid velocity in each of cells defined by three-dimensional orthogonal lattices constructed in a flow field including a turbulent boundary layer formed about a submerged surface of the ship; b. simulating a generation and ejection of a bubble into the turbulent flow layer at a given time from a given jet outlet with a given initial bubble velocity; c. calculating directional bubble velocities in each of cells according to the turbulent flow energy, the energy dissipation factor, the average fluid velocity and random numbers; d. calculating a bubble location at a succeeding unit time by solving equations of motion according to the directional bubble velocities and average fluid velocity; e. calculating a void fraction in each of cells according to the bubble location at the succeeding unit time; f. repeating step c to step e for another bubble for a given number of iterations until an integer time is reached by incrementing a time parameter by a unit time; and g. calculating distribution of void fractions in all cells to represent an overall distribution of bubbles at the integer time, and terminating computation when it is decided that the distribution of bubbles is converging.

There is disclosed a simulator for the flow of a fluid in the field of flow entailing a combustion or reaction, which comprises a visualizing device provided with a model water tank in which there is set up a simulated field of flow by a flow of water containing a large volume of fine, uniform air bubbles. This simulated field of flow is illuminated or visualized by protecting a slit light upon said field of flow in a given cross section of said flow. The irregular reflection of said slit light by the air bubbles is photographed with a television camera and reproduced on a monitor television. Two photosensors are disposed on the monitor screen to measure change in said irregularly reflected beams of light at two close points and the values obtained are fed to a concentration measuring circuit adapted to compare the values of measurement obtained by said photosensors at one of said two points of measurement with the standard values. There is also provided a flow velocity measuring circuit adapted to find time interval in said changes and to find the velocity of flow with said time interval taken as the time required for the pictured aggregate of air bubbles in moving across the distance between said two photosensors. There may also be provided a predicting circuit adapted to predict the change in the flow of a fluid entailing a combustion or reaction along a certain combustion model on the basis of the change in concentration and the change in flow velocity obtained in said two measuring circuits.

There is disclosed a simulator for the flow of a fluid in the field of flow entailing a combustion or reaction, which comprises a visualizing device provided with a model water tank in which there is set up a simulated field of flow by a flow of water containing a large volume of fine, uniform air bubbles. This simulated field of flow is illuminated or visualized by protecting a slit light upon said field of flow in a given cross section of said flow. The irregular reflection of said slit light by the air bubbles is photographed with a television camera and reproduced on a monitor television. Two photosensors are disposed on the monitor screen to measure change in said irregularly reflected beams of light at two close points and the values obtained are fed to a concentration measuring circuit adapted to compare the values of measurement obtained by said photosensors at one of said two points of measurement with the standard values. There is also provided a flow velocity measuring circuit adapted to find time interval in said changes and to find the velocity of flow with said time interval taken as the time required for the pictured aggregate of air bubbles in moving across the distance between said two photosensors. There may also be provided a predicting circuit adapted to predict the change in the flow of a fluid entailing a combustion or reaction along a certain combustion model on the basis of the change in concentration and the change in flow velocity obtained in said two measuring circuits.