Fluid Mechanics's topics - tribe.net

Analytical Instrument recommendations?

Dr. Dave — Thu, 16 Nov 2006 01:14:16 GMT

Can anyone recommend a good vendor(s) for some analytical instruments?

I need a conductivity probe, 0 to 2000 uS/cm
thermocouples, -5 to 35 C
and a flow meter that can measure as low as 20 ml/min but can be scaled up.
They all have to communicate with some type of Data Module with a USB port.
Which ones are easy to work with and which brands are painful to use?

Not a joke. I need them for a project and I haven't done this sort of thing in years.
I am going crazy sifting thru vendor webpages and am looking for some shortcuts.

Dave

posted in Fluid Mechanics - 1 reply

Meteorology

Jay — Mon, 13 Nov 2006 16:37:39 GMT

Hopefully some of you can answer some of these questions for me. Please refer to them numerically:

1) Distinguish among macroscale, mesoscale, and microscale winds. Give an example of each.

2) What are Katabatic (fall) winds? Name 2 examples.

3) Explain how cities create their own local winds.

4) If the Earth rotated more rapidly, the Coriolis force would be stronger. How would a faster rate of rotation affect the location (latitude) of Earth's belts of subtropical high pressure?

5) What area of North America experiences a pronounced monsoon circulation?

6) Why is the flow aloft predominantly a westerly flow? At what time of the year should we expect the fastest westerly flow? Explain.

7) Describe how a major El Nino event in the tropical Pacific might affect the weather in other parts of the globe.

8) How is La Nina different from El Nino?

Thank you for your time ; )

posted in Fluid Mechanics - 0 replies

colored smoke

iNNtention — Sun, 22 Oct 2006 01:16:27 GMT

http://www.sensitivelight.com/smoke2/

posted in Fluid Mechanics - 0 replies

RFC: Centrifugal Filtering

Doctor_Who — Sat, 04 Feb 2006 05:43:04 GMT

I am looking for reccomendations or leads for a centrifugal filter.

Said machine must be able to filter to >1micron or better.

The purpose for this machine is final cleaning of bio-diesel. This machine does not have to be continuous flow, but that would be a nice option.

Can anyone here help educate me on this machines capabilities and limitations? Also brand name reccomendations are appreciated as well.

I need this information for the tech specs portion of my business plan and I would sincerely appreciate any knowledge that folks are willing to share with me.

posted in Fluid Mechanics - 0 replies

Know how satellites work?

monkeylion — Tue, 10 May 2005 01:30:56 GMT

I'm writing a story that involves shutting down orbiting satellites from a locale on Earth. Anyone know how that could theoretically be achieved?

Thanks,
Andrew

posted in Fluid Mechanics - 5 replies

help me keep the foam stiff & colorfull

swooper — Tue, 05 Apr 2005 04:33:57 GMT

I'm planning a fire sculpture for Burning Man. I plan on bubbling hydrogen through a soapy solution that will (I hope) produce a lighter than air foam which will drift up into the sky where it will be ignited. Would anyone know of any additive I might use to strengthen the foam enough to keep wind currents from tearing the foam apart? I’m also looking for inexpensive ingredients that could be added to the foam that would give a nice color (hydrogen produces an orange colored flame) to the flame but is non-toxic when burned (hydrogen burns to produce just water vapor). Perhaps you don’t know the answer but know someone who might know the answer, in that case would you be so kind as to forward the question, Please and Thank You!

Randy Robinson
firebirdsofplayadise@yahoo.com

posted in Fluid Mechanics - 2 replies

Great Aerodyanmics Site From NASA GRC

masabaem — Tue, 12 Oct 2004 23:12:38 GMT

http://www.grc.nasa.gov/WWW/K-12/airplane/shortp.html

Enjoy!!

posted in Fluid Mechanics - 0 replies

Thermodynamics4entropy.tribe.net

Leane — Sun, 10 Oct 2004 17:21:53 GMT

I've created a new tribe at the above address for Thermodynamics and Entropy (classical and statistical) for anyone who is interested.

Thanks

--Leane

posted in Fluid Mechanics - 0 replies

Re: NASAs Scramjet

mika — Wed, 31 Mar 2004 23:20:08 GMT

Does anyone think this will be scaled to a passenger version?

Hypersonic Airbreathing Propulsion is all great, but fundamentally we are still in the realms on Newton's 3rd Law.

Is it time for a fundamental rethink for thrust.

posted in Fluid Mechanics - 4 replies

Active Flow Control

XT — Wed, 07 Apr 2004 08:34:55 GMT

This is some interesting stuff. It can reduce turbulence and alter pipe flows besides who knows how many other applications to this technology. Anybody else out there ever heard of this technology?

posted in Fluid Mechanics - 1 reply

Hilsch Tubes

masabaem — Tue, 30 Mar 2004 16:28:58 GMT

Anyone else heard of Hilsch tubes. They can be used to create temperature differences from almost any temperature air (above 0K of course!).

This seems to compare favourably to the usual Freon-Adiabatic-Expansion regimes we are used to.

It seems to have been a technology that fell by the wayside.

Look 'em up.

posted in Fluid Mechanics - 4 replies

SuperCavitation

masabaem — Wed, 31 Mar 2004 23:21:29 GMT

This phenomena could yield supersonic (in water!!!!) submarines.

Has anyone else heard of it.

The Kursk had supersonic torpedoes with 120Mt warheads!! This principle was also ustilised on aerospike vehicles.

What do you all think?

posted in Fluid Mechanics - 3 replies

Fluid conductivity

John — Mon, 29 Mar 2004 19:42:27 GMT

Does anybody know what type of conductive fluid would be best for use in an electromagnet so as to increase current though an increase in surface area?

posted in Fluid Mechanics - 4 replies