Streamlined fins

These bombs were not described in Vol 2 of Encycl. They are long and more slender than earlier types of GP bombs, and have a long pointed nose. A streamlined fin is attached to the tail end of the bomb body by 6 or 8 setscrews. These bombs use mechanical, proximity (VT), or electrical fuzes. 

One way to structure the surface is to mimic a regular porous network. Rhombic structures are used to modify and disturb the laminar liquid flow [52]. So-called streamlined fins are arranged horizontally in different rows (Figure 7.14a). The rows are shifted in such a way that one rhombus is positioned in the center of the space between two neighbored rhomb of the up- and downstream rows. This arrangement forces the redirection of the flow, thus ameliorating the mbdng of the fluid in a split and recombine manner. 

Two immiscible fluids A and B, of viscosities p./t and fin, flow under streamline conditions between two horizontal parallel planes of width b, situated a distance 2a apart (where a is much less than b), as two distinct parallel layers one above the other, each of depth a. Show that the volumetric rate of flow of A is ... 

The simulations of fluid flow and heat transfer in such microstructured geometries were carried out with an FVM solver. Air with an inlet temperature of 100 °C was considered as a fluid, and the channel walls were modeled as isothermal with a temperature of 0 °C. The streamline pattern is characterized by recirculation zones which develop behind the fins at comparatively high Reynolds numbers. The results of the heat transfer simulations are summarized in Figure 2.34, which shows the Nusselt number as a fimction of Reynolds number. For... 

Marlins are large fish with elongated, bill-like snouts, fairly high dorsal fins, and a streamlined body. 

Many modified designs have been proposed usually they are based on some hydrodynamic principle. Figure 2.20 shows a cap that includes an insert to give streamline vapor flow. Another experimental type, shown in Fig. 2.21, is provided with fins for better vapor dispersal. Lateral screened skirt caps have also been proposed, the most recent entry being the VST cap developed by the... 

Yeom and Oh (2009)]. Fig. 9.1 shows two prototypes of robotic fish that are propelled and maneuvered with an IPMC-based caudal fin, which were developed by the Smart Microsystems Laboratory at Michigan State University. The prototype in Fig. 9.1 was used in the model validation later in this section. The body of the robot was rigid with a streamlined shape, and it housed rechargeable batteries and various electronic components that enabled untethered operation of the robot. The robot had a length of 20 cm without the tail and its maximum diameter was 5.7 cm. 

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