Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations MintJulep on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: 777gne
  • Order by date
  1. 777gne

    Non-Newtonian Pressure Drop (revisited)

    After quite a bit of help from Latexman last year (this thread: http://eng-tips.com/viewthread.cfm?qid=177111&page=1) I have been calculating frictional losses for power law fluids rather successfully. Most of the calculations I have double checked by a fluids lab that I work with and my...
  2. 777gne

    3D Thermal Data?

    Thank you both for your replies. We actually have several types of media, all of which are granular solid composites (think along the lines of typical soil). We're working with one cubic meter. The heat source is located at the center extending downward 1/2 meter. There has been some...
  3. 777gne

    3D Thermal Data?

    I'm completely new to thermography. I'm involved in a project that where we're introducing a heat source into the center a cube-shaped medium. We need to record the migration of the heat in all directions from the source over a fixed time interval (2-3 minutes). The ideal end result would be an...
  4. 777gne

    Flow calculation

    This isn't a student post. This is an existing chiller loop where a small tubular hxx is tapped off the header without a booster pump. I'm trying to get an idea of how much glycol water is moving through the line due to the differential pressure. I didn't design the thing but I have to deal with...
  5. 777gne

    Flow calculation

    The above diagram represents 2 pipe circuits, the header in bold and a utility circuit (thin blue line). The pressure at points P1 and P2 is known, and the header flow rate is known. The pressure at P3 is assumed to be equal to P1 (close enough to call equal). Can the flow rate through the...
  6. 777gne

    EPDM or Viton against ozone?

    What is the consensus regarding EPDM and VITON resistance to ozonated water? I have had problems with EPDM in and gaseous ozone, VITON was better in this case. I have heard mixed reviews on which to use when it comes to ozonated water. I'm not a CE so admittedly I don't know how it would differ...
  7. 777gne

    Corrosion Resistance

    Radar can be problematic if not kept clean, if the product tends to foam, or if the tank geometry is unusual. If you can get AL6XN probes I'd go that way, or possibly ultrasonic.
  8. 777gne

    Handrails needed or not?

    Thank you each for your replies. The varying responses are pretty much what I expected to see. The link that JLSeagull provided is very helpful for what I would call standard platforms, and pretty much what I adhere to in those cases, specifically all of section (e). I think Jim Casey hit the...
  9. 777gne

    Handrails needed or not?

    This topic has come up over and over at our plant. When building an elevated work platform, at what height are handrails required (by OSHA). We have several platforms that are less than about 12" above the floor without handrails, that operators use intermittently. UBC doesn't really cover this...
  10. 777gne

    Glycol / Water Mixture Vapor Pressures?

    Thanks guys, that was just what I needed.
  11. 777gne

    Capacitive Prox Switch Question

    If a capacitive prox switch, being used to detect liquid level, becomes submerged by the liquid is would you still expect it to signal the PLC that it detects the liquid? One would think so, I'm just wondering if this might produce erratic results. The assumption is of course that the...
  12. 777gne

    problem in chocolate factory

    Did you say the the velocity of your CIP water is 3ft/sec? If so, I don't know that it would be causing all (or any) of your issues, but that's a very low velocity in most CIP situations (I have no experience with chocolate however). 7-10 ft/sec is a good rule of thumb for CIP velocity...
  13. 777gne

    Glycol / Water Mixture Vapor Pressures?

    I need to determine the vapor pressure of a 50/50 mixture of propylene glycol and water at several temperatures around 100-140 degrees F. Does anyone know of a good reference that might have this information tabulated?
  14. 777gne

    Non-newtonian Pressure Drop

    Whoa, you snuck a few posts in up there that I just saw. I'm working in English units. The only reference material I have on this subject is in SI units. v = Pa.s K = Pa.sn
  15. 777gne

    Non-newtonian Pressure Drop

    I didn't write it properly in the forum but order of ops I'm using is standard. I went back and solved it again using SI units and was able to get the same result that you did. I made an decimal point error converting Cp to Pa.s (see my post far above). Which was part of the problem. The other...
  16. 777gne

    Non-newtonian Pressure Drop

    Also a few notes, and I'm not trying to point any fingers here (did I mention how much I appreciate the help?)... but.. I think you have possibly posted a couple of errors above. 1) The flow rate needs to be volumetric for the units to work out. 2) By definition 1000 cp = 1 Pa.s, so I don't...
  17. 777gne

    Non-newtonian Pressure Drop

    Took another stab at it today... still scratching head. I'm unable to get anything close to your result above. I would love to take a look at the spread sheet you're using to see how it is calculating the result you posted above and especially what units and conversions it's performing.
  18. 777gne

    Non-newtonian Pressure Drop

    Latexman, First, thank you for shinning some light on this subject. Your post made sense and I was able to find and cross reference everything you stated in my food engineering book. I'm a little unsure about the units of the proportionality coefficient. My book states units of Pasn, for...
  19. 777gne

    Non-newtonian Pressure Drop

    Latexman - Thank you! ...need some time to absorb and run a few numbers. Will post results/questions later...
  20. 777gne

    Non-newtonian Pressure Drop

    Thanks Charlie. I just saw your post. I'm in deeper than I thought here, so getting ready to make a phone call. Side Note: For interested parties who are reading I found what appears to be an in-depth book on rheology here: http://www.egr.msu.edu/~steffe/freebook/STEFFE.pdf

Part and Inventory Search

Back
Top