Flow Visualization Assignment Help
Flow visualization in fluid dynamics is used to make the flow patterns visible, to get quantitative and qualitative information
on them. Flow visualization is the art for making flow patterns most visible. Most fluids such as air, water, etc. are transparent. Hence, their flow patterns are invisible to us without some special methods to make them visible. Such methods include experimental methods; like say spilling ink into water.
Flows are visualized by three methods in experimental fluid dynamics:
- Optical methods - In the optical refractive index, some flows reveal their patterns by way of changes. These are visualized by the optical methods known as the schlieren photography shadowgraph, and interferometry. To measure concentrations, dyes can be added to flows, typically employing the laser-induced fluorescence techniques or the light attenuation.
- Surface flow visualization - As a solid surface is approached, this reveals the flow streamlines in the limit. To the surface in a wind tunnel model, Colored oil is applied.
- Particle Tracer method - To trace the fluid motion, particles, such as smoke, can be added to a flow. For visualizing a slice of a complicated fluid flow pattern, we can illuminate the particles with a sheet of laser light. We can not only visualize the flow, by assuming that the particles, faithfully follow the streamlines of the flow, but also measure its velocity using the particle image velocimetry or particle tracking velocimetry methods.
Flows are visualized with two main methods in scientific visualization:
, which analyzes the given flow and show properties like streak lines, streamlined, and path lines. The flow can either be given as a smooth function or a finite representation.
Texture advection methods
that bend texture according to the flow. These methods would visualize approximations of the real flow as the image is always finite.
The numerical solution of the governing equations can yield all the fluid properties in time and space
in computational fluid dynamics. This overwhelming and an amount of information needs to be displayed in a meaningful form. Therefore, flow visualization is equally important in computational as in experimental fluid dynamics.