THE BUSINESS OF VISCOSITY BLOG



    Why Can’t I Get a Reliable Viscosity Measurement on My Thixotropic Fluid with a Zahn Cup? – Part III

    Posted by Mike Bonner

    Aug 13, 2019 4:14:00 PM

    In Part II of this series, we continued our discussion on viscosity by tackling the topic of thixotropy.  With this defined, we can now circle back to bring it all together and show how different measurement methods produce different results and how our measurement choices can actually work against us.

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    Topics: Zahn cups, Efflux Cups, fluid process control, viscometers, viscometry, non-newtonian fluids

    Why Can’t I Get a Reliable Viscosity Measurement on My Thixotropic Fluid with a Zahn Cup? – Part II

    Posted by Mike Bonner

    Aug 6, 2019 3:38:00 PM

    In Part I of this series, we examined some of the issues with the viscosity cup measurement process and started to look at the fundamentals of fluid viscosity as a means of explaining the source of those problems.  In this installment, we pick up the discussion with a somewhat difficult topic:  thixotropy.

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    Topics: Zahn cups, Efflux Cups, fluid process control, viscometers, viscometry, non-newtonian fluids

    Why Can’t I Get a Reliable Viscosity Measurement on My Thixotropic Fluid with a Zahn Cup? – Part I

    Posted by Mike Bonner

    Jul 30, 2019 10:28:00 AM

    Manufacturers who dispense fluids in their process (i.e. – paints and coatings, sealers and adhesives, potting compounds and encapsulants, etc.) all understand that the viscosity of that fluid is fundamental to the process out

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    Topics: Zahn cups, Efflux Cups, fluid process control, viscometers, viscometry, non-newtonian fluids

    How Big is Big? (or, “I Need How Much Space for That?!?”)

    Posted by Mike Bonner

    Jul 23, 2019 9:37:00 AM

    I recently received an e-mail from BV Thermal Systems, a supplier of chillers, that caught my eye.  It opened with a statement that is all too familiar in our world of temperature control:

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    Topics: paint and coating, Industrial finishing, coating aluminum, Coating Technology, fluid process control, coating, temperature control systems, automotive paint finishing, future technologies

    Heat Exchanger Fluid Velocity – Why Should I Care?

    Posted by Mike Bonner

    Dec 7, 2017 3:02:00 PM

    The heat exchanger is the core device in virtually every fluid temperature control system.  Unfortunately, properly selecting a heat exchanger can be a daunting task.

    First, there is the thermal load that must be transferred. Next are working pressure, flow rate, and chemical compatibility requirements.  Coupled with the thermal transfer, these determine the configuration (gasketed plate, brazed plate, shell & tube, etc.) and the materials of construction (carbon steel, stainless steel, aluminum, titanium, etc.). 

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    Topics: Manufacturing, Temperature control, Point of Application, fluid process control, temperature control systems

    Use Fluid Process Control to Gain 2+ Hours of Daily Run Time

    Posted by Mike Bonner

    Aug 24, 2015 11:00:00 AM


    We talk a lot about the new reality for coil coaters. Their customers are demanding smaller lot sizes and more frequent shipments. Often they are asking for delivery of just a portion of a coil!

    This has driven coil coating runtimes down proportionately. The average coating system run is now less than one hour. In turn, this translates into 1–2 color changes per hour. And if you do the math on that, it extends out to more than 30 color changes per day!

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    Topics: PCM, fluid process control

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