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Recent content by blackmot

  1. blackmot

    A387 Grade 5 supplier - North America

    I am seeking a supplier for a very small quantity of 5-chrome plate, to be used for machining corrosion test coupons. Would anyone be able to point me to a North American supplier? I have been searching in the web, with very limited success. Everything seems to come up as UK or India. Thanks
  2. blackmot

    Impact of volumetric shrinkage on prediction of viscosity of blends

    I am doing a study on viscosity blending requirements for heavy crude oil to pipeline specifications, using density control/feedback to the blending unit. The prediction of the viscosity of crude oil blends using the Refutas equation usually works quite well, but in this case I am finding that...
  3. blackmot

    Calculation of shear rate/film thickness

    Thanks for the replies Latexman. I am tryng to calculate the shear rate on a piece of metal with a given flow moving past it. I am rotating a coupon in an autoclave enviroment, with the large surfaces oriented parallel to rotation so that the flow runs smoothly over the coupon in a high Re...
  4. blackmot

    Calculation of shear rate/film thickness

    While this is an exellent reference to the operation and theory of rotational viscometers, it contains no information applicable to my problem. The formulas presented herein for calculation of shear rate are solely for rotational systems, with sufficiently small gaps that the shear distance is...
  5. blackmot

    Calculation of shear rate/film thickness

    I am trying to calculate the shear rate on the surface of a metal coupon being moved at a constant rate in a Newtonian fluid. In order to do this, I need to know the thickness of the boundary film, and I have not been able to find a means of calculating or estimating the boundary film...

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