دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an absolute flow property indicating the flow resistance of certain types of fluids. It is a measure of shearing stress.

n: a measure of internal resistance of fluid attributable to the amount,type and size of solids present in a given fluid. It is expressed as the number of dynes per sq cm of tangential shearing force in excess of the bingham yield value that will induce a un

an absolute flow property indicating the flow resistance of certain types of fluids. A measurement of shear stress.

n: The index mark of flowing characteristics of all kinds of fluid,for example , viscosity,gel strength,yield value and shear thinning characteristics.

n: The index mark of flowing characteristics of all kinds of fluid,for example , viscosity,gel strength,yield value and shear thinning characteristics.

n: the resistance to initial flow, or the stress required to start fluid movement. This resistance is caused by electrical charges located on or near the surfaces of the particles. The values of the yield point and thixotropy, respectively, are measurements of the same fluid properties under dynamic and static states. The Bingham yield value, reported in pounds/100 square foot, is determined from a directindicating viscometer by subtracting the plastic viscosity from the 300-rpm reading. Also called yield point.

Also called movable shear stress. The viscosity dont change along with the shear stress when shear stress arrive a given value,now shear stress and rate of shearing present direct ratio relation, the value of crossing point of this direct ratio relation

the critical shear stress that must be exceeded before flow can be initiated.