Edge Effects with Cone and Plate

Tanner (1970) has analyzed the drowned edge and finds for a second-order fluid that eq. 5.4.20 becomes 

Average pressure profiles (clockwise and counterclock wise) for a 3% polyethylene oxide solution. From Olabisi and Williams (1972). 

He reports that the results of Adams and Lodge (1964) and Kaye et al. (1968) seem more reasonable when corrected with eq. S.4.30 and for pressure hole errors. Olabisi and Williams also find some experimental agreement with Tanner s equations. 

Edge failure with poly-dimethylsiloxane ( = 14,000 poise at 25°C) in parallel disks. From Broyer and Macosko (1975). 

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