Triangular cell

Crimped Metal Ribbon A flame arrester element that is manufactured of alternate layers of thin corrugated metal rihhon and a flat metal rihhon that are wound together on a mandrel to form a cylindrical assembly of many layers to produce a range of different sized triangular cells. The height and width of the triangular cells can he varied to provide the required quenching diameter. 

Figure 4.36 Y-O-F vernier structures (a) idealized square anion net in Y706F9 (b) idealized hexagonal anion net in Y7OgF9 and (c) the two nets superimposed to show that seven square cells fit with eight triangular cells, which represents the idealized anion nets in Y7C>6F9.

Figure 4 Honeycomb substrates with square and triangular cell structure. (From Ref. 22, courtesy of SAE.)...

Figure 6 defines the parameters L, t, and R for the triangular cell Its geometric properties are given by the following ...

The initial substrates in 1975, with square cell configuration, were designed to have 200 cells/in. with a wall thickness of 0.012 in. They were extruded from cordierite composition (EX-20), which had a fired wall porosity of 35%. Similarly, the triangular cell substrates had a cell density of 236 cells/in. and a wall thickness of 0.0115 in. They were extruded from a lowcr-CTE cordierite composition (EX-32), with a fired wall porosity of 40%. The geometric properties of these two substrates, as well as current versions of square cell substrates with cell density of 3(X) and 4(X) cells/in. are summarized in Table 1. 

The cordiente composition EX-32 for 236/11 5 A is designed to yield a lower CTE than EX-20, to compensate for the higher E-modulus of the triangular cell substrate [34]. 

As a consequence of higher cell rigidity, the E-modulus of triangular cell substrate is correspondingly higher, resulting in a similar strain tolerance as that lor square cell substrate... 

The pressure drop values in Table 12 are based on constant flow rate (i.e., given engine conditions) and constant total GSA (i.e., equivalent conversion activity). They are giyen by Eqs. (40) and (41) for square cell and triangular cell, respectively ... 

Cybulski and Moulijn (MC), (S) Multichannel model for the investigation of metallic monoliths. Discrete model based on triangular cells... 

Figure 11.13 Use of unidirectionally drawn perforated HOPE sheet as the vertical walls of triangular cells, that form a reinforcing mattress at the base of an embankment (from Tensor Geocell Mattress pamphlet, Courtesy of Netlon).

Basal cells are polygonal or triangular cells localised immediately above the basement membrane. Usually, they do not reach the free surface of the epithelium. Their cytoplasm is electron-dense. Tono-filaments are arranged in perinuclear array. Golgi complex and endoplasmic reticulum are poorly developed. 

Figure 9. Emission from triangular cell filled with an ethyl acetate solution of PM567 with 13 wt % of 8MMAPOSS nanoparticles. Pumping at 532 nm with 5.5 mj/pulse.

However, our numerical tests have shown, that these three sectors suggested in [14] not alwaj provide stencils with smooth data. Therefore, we introduce additional sectors in order to cover neighboming regions of a triangular cell Te, that are not covered by the three forward sectors Tj, j = 1,2,3. 

It is well-known, that explicit time discretization schemes, such as the proposed ADER scheme, have to satisfy rather severe restrictions on the time step T due to the Courant-Friedrich-Levy (CFL) condition. Loosely speaking, disturbances from one cell boundary must not reach another boundary within one time step. Let p( be the radius of the inscribed circle of a triangular cell Ti serving as a measure of its diameter (see Figure 7), and let... 

Fig. 7. The radius p of the inscribed circle of a triangular cell together with its Nx = 2 integration points per edge, where the maximum characteristic speed normal to each edge is evaluated.

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