The study of the flow of power-law fluid in a helical pipe with circular section with perturbation method.

采用摄动方法研究了圆截面螺旋管道内幂律流体的流动。

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The flow of power-law fluid in a helical pipe with circular section has been studied using perturbation method.

采用摄动方法研究了圆截面螺旋管道内幂律流体的流动。

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The displacing fluid of power law fluid with yield stress and displaced fluid of Bingham are used to illustrate these effects.

文中用带屈服应力的假塑性流体描述驱替液性质，用宾汉流体描述原油性质。

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Like every other law governing fluid disclosure, the Texas law contains a provision that allows contractors to protect chemical ingredients or compounds that qualify as proprietary information.

FORBES: Clearing The Air On Hydraulic Fracturing Laws In Texas

Texas became the first state in the union to require well-by-well disclosure of all ingredients of fracturing fluids being used anywhere in the state when Governor Rick Perry signed into law House Bill 3328, the Texas Hydraulic Fracturing Fluid Disclosure bill, in June, 2011.

FORBES: Clearing The Air On Hydraulic Fracturing Laws In Texas

Disclosure could allow competing companies to reverse-engineer fracking fluid formulas, they argued, and Wyoming's open-records law contains an exemption that allows trade secrets to be withheld from the public.

NPR: Judge Sides With Wyoming In Fracking Chemical Suit