Category Archives: Jenike Blog

Gone With the Wind or Slipped Through the Cracks

  If you are handling a blend of powder ingredients such that some of the ingredients are relatively fine and others are coarse, did you ever experience that the ingredients were separating during handling? Were you ever left wondering where … Continue reading

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Tall and Slender vs. Short and Squat

  Have you ever wondered why silos are generally tall and slender while oil tanks are short and squat? Take a look at the two images below…compare the height-to-diameter ratios for the different vessels. So, why do you typically see … Continue reading

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I Can’t Get Away From Bulk Solids … or my Co-Workers … Even on the Weekend!

  They are everywhere. Or at least their footprints. I wake up Saturday morning looking at my alarm clock. The plastic case, the magnet in the speaker, the glass face – were all bulk solids once. The very fact that … Continue reading

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What’s the Number One Rule of Powder Handling?

The number one rule of powder handling is that there are exceptions to every rule! Consider wall friction. In order to achieve mass flow and prevent ratholing, the walls of a hopper must be steep enough and low enough in … Continue reading

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It’s All In The Details – DEM

  Have you ever tried building something only to find out that it doesn’t work? You’ve followed the design plan and assembled the parts but at the end of the day it just doesn’t operate correctly. This happened to me … Continue reading

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Mass Flow or Funnel Flow- What do you Have?

  We at J&J often are pushing for mass flow to minimize segregation or other common flow problems – so how do you identify the flow pattern in your silo? After I had worked at J&J for a while, I … Continue reading

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How Bulk Material Variations are a Drag on our Economy

  At J&J, we encounter many situations where bulk material processes operate at an “adequate level” only, leaving room for improvement with the final product. One such challenge has to do with segregation, or variations in the properties of the bulk … Continue reading

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Silo Design: How to Get it Right the First Time – Chapter 3

Design for the effects of non-axisymmetric loading Over the last 30 years I have been asked to investigate dozens of silo and bin designs in which something has gone wrong. Construction has been in reinforced concrete, steel and aluminum. Problems … Continue reading

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The Purge Column: There can be Material Flow Consequences

No, this has nothing to do with the movie “The Purge”! Sorry for the disappointment! However, I am going to write about an interesting topic here, that is if you are interested in bulk solids handling applications. The chemical industry … Continue reading

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Got training ?

How — web ?  conference ?  in-house ? I know, I know, you have likely heard this analogue as a rip-off from the famous “drink milk” marketing campaign [1] that started in the early 1990’s. Pretty effective though, right? So, … Continue reading

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