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Recent content by Dmanley

  1. Dmanley

    Effect of a bar in air flow

    Thanks for the response rb1957, I just may send the info to our local college. About the splitter sheet, you would have to clean under that sheet quite regularly hence the reason we use clean air. Thanks again to all for there input. Regards, Derry
  2. Dmanley

    Effect of a bar in air flow

    Thanks all, for your responses! I'll explain the situation more and it may help get my issue across. I'm in manufacturing facility which fills sterile vials in a Grade A (Class 100) environment, as the vials move through the filling machine and then on to a freeze dryer, the vial pass through...
  3. Dmanley

    Effect of a bar in air flow

    Hello, Could someone help me out with this little question? I'm trying to find out what the length of a turbulent area would be behind a bar in a given air flow? My situation is a bar in a laminar air flow unit in the pharma industry. The bar is 20 mm in dia and the air flow is laminar at...
  4. Dmanley

    Temperature and Pressure to Dryness Fraction

    Ok... I'm getting a little put off here because I’m in Metric and when i try to do what you’re saying it gets a bit messy. I have: Temperature 126.1 (deg C) 258.98 (F) Pressure 2.47 (Bar A) 35.8 (PSI) Ok from this I think my value goes inside the envelope. I don't have a copy of...
  5. Dmanley

    Temperature and Pressure to Dryness Fraction

    Hello, Could someone help me refresh my memory from college days? How would one find out the dryness fraction/Steam quality when you know the temperature and pressure? I know it has something to do with a load of formulas and charts but for the life of me I can't remember what to do with...
  6. Dmanley

    Bumper Cars

    Why do they only test cars up to 64kph(40mph)? I know that there is a whole range of tests at different speeds, but the highest speed I've come across is 64kph! I understand that it is a regulatory requirement for them to be tested at this speed but is it that it would be too costly and...
  7. Dmanley

    Bumper Cars

    Thank you for all that, I was really expecting one link or look at Google! This is fabulous information!
  8. Dmanley

    Bumper Cars

    Hydroformer, you seam to know actual details about this kind of stuff, where would be a good source of actual spec's and requirements for the crumble zone of a car? I'm trying to figure out if an idea I have is good enough for development!?! Thanks again for all the comments and replies. Derry
  9. Dmanley

    Bumper Cars

    Thanks for the replies, I do understand the difference between springs and energy absorbing, my question is why not add something like two pistons to the front bumper that absorb the impact energy and collapse at a certain pressure? To me it seams logical, like putting rubber mountings on bull...
  10. Dmanley

    Bumper Cars

    Just something I've been thinking about the past while and I can’t seam to find an answer any where. Why aren't there big springs or shock absorbers in the front of cars to absorb the impact of a crash? Why isn't there a shock absorber behind the front bumper to help alleviate some of the...
  11. Dmanley

    Removing lines from csv to reduce size for Excel.

    How could I delete every second line (or 2 in 3 lines etc..) from a csv file so as to reduce the size so excel could open the full file and analysis the info.? Thank you for your help.
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