To gain some understanding of the phenomena taking place in the mixing zone in T-junctions, numerical investigations have been carried out to determine the thermal mixing length.
The aim of this paper is to determine the mixing length where homogenous temperature distribution is established.
It has been numerically demonstrated that the mixing length, at which constant temperature distribution occurs, is at its end (x/L = 1) if a tolerance of 1[degrees]C is considered.
The initial turbulence intensity was set at 5% of the mean flow, and the integral length scale was estimated with the mixing length
model of Prandtl.
The Cobras could well be without their cleverest fast bowler - in terms of mixing length
, line and pace - Charl Langveldt, after he injured himself diving in the field against Bangalore.
Because the available reactor volume is slightly different when different elements are used (Table 2), the downstream volumes were defined in terms of the corresponding additional mixing length [lambda], the length of the section downstream of the probe that is part of the apparent volume over which the mean residence time is measured.
Table 2 shows that additional mixing length of the material at both measurement points was highly influenced by the elements in the measurement section.
Part of the additional mixing length could be caused by two factors.
More versatile than Farrel's original continuous mixer, the unit features extra mixing length
and residence time and what the supplier terms a vastly expanded processing window.
Because glass fiber breakage should, of course, be kept to a minimum, the mixing length for glass fiber compounding is generally 50% shorter and less intensive than for kaolin.
After the results from a series of different compounds on the twin-screw extruder are confirmed, the torque curves from an internal mixer, such as a Haake or Brabender, can be used for setting up the mixing length on the twin-screw extruder.
The mixing process is more difficult for high-viscosity resins, and therefore, they require more mixing length in the extruder.