Internal port geometry

Chant, A. Wdcock, D. Costello, D. (1998). The Determination of IC engine inlet port geometries by Reverse Engineering, International Journal of Advanced Manufacturing Technology, Vol.l4, p>p. 65-69, ISSN 0268-3768... 

At the output end of the compounder, removal of molten compound maybe as a large mass via a discharge port from an internal mixer, or through a die which defines the geometry of the compound. In the latter case, sufficient pressure must be developed to overcome the flow restriction imposed by the die. 

Schematic of internal structure ofthe holder with a glass chip (side view), (c) Top view of the formation of biphasic droplets in the module, (d) Magnified view of the co-flow geometries, (e) Magnified view of the outlet port in the center of the chip. From Ref [18].

The derivation of the output from an integrating sphere is similar to that for a cavity blackbody We need to account for multiple reflections, and to do that we need consider the geometry and reflective characteristics of the internal surface (reflectivity, and the extent to which it is Lambertian). For the integrating sphere, however, we also need to know the irradiance at the input port and the nature of the reflectivity of the input and output port assemblies. That part of a port assembly that is truly open has zero reflectivity, but part of the port assembly has some reflectance that may differ from that of the sphere itself. A reasonable approximation would be to assume that reflectivity from the port assemblies is either zero (the open portion) or equal to that of the sphere itself. Another difference is that a blackbody has a high effective emissivity (low reflectivity), while for an integrating sphere we want a high reflectivity. 

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