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  • Users: RGCook
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  1. RGCook

    Compressible Flow Sudden Contraction

    I have saturated air (with water) flowing in a large duct at a nominal 1 ft/sec velocity. There is a sudden contraction such that the velocity becomes 45 ft/sec in the duct and the flow continues on inside the smaller duct for a long distance (not a nozzle). I am wondering how I calculate what...
  2. RGCook

    Debunking the Control Architectures

    Can anyone point me to a good reference that describes and debunks the various architectures currently in use for control systems. In particular, I am interesting in learning more about the following: 1. Analog (4-20ma) and Discrete IO versus 2. ModBus TCP/IP versus 3. Profibus, versus 4...
  3. RGCook

    316L Vessel Cracks near welds

    Hello, I am a chemical engineer with no materials science expertise. I have a problem with a 10,000 gallon 316 Stainless steel reactor. It is 10' diameter with ASME heads top and bottom. This may sound strange but the vessel normally runs with only 12 inches of liquid (sidewall depth). I sparge...
  4. RGCook

    Polynomial Trendline parameter Extraction

    Does anyone know of a way to extract the paramters from a polynomial regression (trendline) in Excel. I have quickly looked through the object model and don't see it.
  5. RGCook

    Hello all, I am looking for a gi

    Hello all, I am looking for a gizmo to remove pumps on chains from wet wells. To use the gizmo, you put the gizmo on the end of the cable to your hoist or winch. Then put the chain through the gizmo and let it slide down the chain to anywhere you like on the chain and reel up your cable and...

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