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Figure 6. Flow behavior of extruded (16% moisture, 175°C and 150 rpm) and unextruded corn starch at 6% concentration and 60°C (84).

neers and rheologists. The two methods used to measure primary normal stress difference are the exit pressure method and the hole-pressure method. Exit pressure is the residual stress at the die exit. For inelastic fluid this pressure is zero, but positive for a viscoelastic fluid. Hole pressure is defined as the difference between the pressure measured by a flush-mounted transducer and a transducer located at the bottom of a slot directly opposite to it (Fig. 7). For a Newtonian fluid, under creeping flow conditions (Reynolds number ~ 0), the hole pressure is zero.

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Berry Boosters

Acai, Maqui And Many Other Popular Berries That Will Change Your Life And Health. Berries have been demonstrated to be some of the healthiest foods on the planet. Each month or so it seems fresh research is being brought out and new berries are being exposed and analyzed for their health giving attributes.

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