Wavy pattern

In his supplement to Syllabus, Dunkle remarked (Ref 22, p lid) that schlieren photography of deton waves in 40/60 C2H2/O2 initially at 1/4 atm showed a wavy pattern of criss-crossing dark diffuse lines behind the front. Fay Opel (Ref 17) calculated that if these lines are a weak wake of Mach waves in supersonic flow, the flow of the burnt gases with respect to the front is Mach 1.14 rather than Mach 1.00 as in a C-J process. However, at this pressure the reaction is complete within a fraction of a millimeter behind the front, and the flow could very well accelerate to Mach 1.14 with density decrease below the C-J value. Fay Opel traced the effect to the boundary layer. 

For conditions where ECT starved feed conditions, and coverage of the substrate is non-uniform, i.e., in spotty or wavy patterns. 

Older pieces of tortoiseshell that have lost their high polish display so-called watermarks - a fidnt, wavy pattern on the surface more... 

For the continuum case (Kn = 0), without viscous dissipation, local Nu has a wavy pattern, as shown in Fig. 7, similar to the observations in Refs. [17, 20] for triangular roughness elements. Velocity and temperature gradients are higher at the peaks of the elements, thus local Nu is larger there, while at the bottom comers, the low gradients result in minimum local Nu. 

During the first millennium B.C.E. a highly superior steel product was made in India, in a region near Hyderabad. Well known for its strength and its wavy patterned surface, it was especially desirable for making sword blades. Some think that the ore found in that area just happened to have the right impurities to give the steel special properties. The hot iron was... 

Abstract Pattern formation is a widespread phenomenon observed in different physical, chemical and biological systems on varions spatial scales, including the nanometer scale. In this chapter discussed are the universal features of pattern formation pattern selection, modulational instabilities, structure and dynamics of domain walls, fronts and defects, as well as non-potential effects and wavy patterns. Principal mathematical models used for the description of patterns (Swift-Hohenberg equation, Newell-Whitehead-Segel equation, Cross-Newell equation, complex Ginzburg-Landau equation) are introduced and some asymptotic methods of their analysis are presented. 

We will explain why the above-mentioned two kinds of patterns are so widespread, and the conditions of their appearance will be formulated. It should be noted, however, that other kinds of patterns, e.g. square patterns [19] and even quasiperiodic patterns [20] can be also observed. Moreover, there exist non-stationary, wavy, patterns in the form of traveling [21] and standing waves... 

Flow marks Directionally wavy patterns in part Injection speeds too low, mold temperature too low... 

PAINT THE BASE COAT. In four separate buckets, mix one part paint with one part water and one part clear latex glaze. Start with two somewhat similar colors as your base. Bmsh wavy patterns of these two colors onto the wall or piece of furniture so they bleed into each other in fairly organic patterns. Use a wet painting sponge to soften and blur the lines between them. 

Films under compression will try to expand. If the substrate is thin, the film will bow the substrate with the film being on the convex side. If the film has a tensile stress, the film will try to contract, bowing the substrate so the film is on the concave side. Tensile stress will relieve itself by microcracking the film. Compressive stress will relieve itself by buckling, giving wrinkled spots (associated with contamination of the surface) or a wavy pattern (clean surface), as shown in Figure 11.1. Compressive stress in a ductile material may relieve itself by generating hillocks (mounds of material). The stress distribution in a film may be anisotropic and may even be compressive in one direction and tensile in another. 

---