HDTenEightyP/NetNews huggingface dataset:
From: tron@tc.fluke.COM (Peter Barbee)
Subject: Re: Aero/Astro Vs. Mech E.
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Date: Wed, 19 Aug 1992 16:01:21 GMT

>> My background is in mech eng but my first real job was in an aerospace
>> company doing composites. The aero major is not a necessity for doing 
>> cool stuff (things that go fast, and explode). I liked Mech because of
>> the diversity of interests it covers - fluids, heat transfer, acoustics,
>> composites, elasticity, etc... That sold if for me!
>>
>	In the long run as far as flexibilty within the workplace and
>broad knowledge, Mech is the way to go. You do most of your
>specialization in the workplace anyway. 

As an ME it wouldn't be too surprising for me to defend that choice.  I
chose to work for an electronics company where I knew the EEs would
more likely have the "glory" jobs.  And so in my 8 years here I have
worked on projects such as: transparent membrane switches utilizing
conductive thin film oxides, high speed flexible circuitry (transmission
line theory) doing joint reserch with material manufacturers, designing
an isothermal input block (for thermocouples) without using an isothermal
block, cooling a portable instrument with a thermal load of over
10 watts per sq in.  And lots of other cool stuff.  I've had the
opportunity to receive 3 patents and I've never been bored by having
to solve the same problem yet another time.

In college don't worry about the facts - most of the problems in the
real world won't look anything like problem 8-12.  Worry about learning
how to think, how to approach a problem, and how to follow through.

Peter B
From: kuopei@milton.u.washington.edu (Pei Kuo)
Newsgroups: sci.engr.mech
Subject: Dynamic Balance of rotating machinery (ROBAL?)
Summary: looking for pointers to algorithms or pgms
Keywords: balance, vibration
Date: 21 Aug 92 12:00:10 GMT
Organization: University of Washington

Am about to write a program does dynamic balance of rotating machinery
(multiplane, multispeed, linear systems), and am looking for existing
solutions. Can anyone point me to some existing (source) code that does 
this? Was recently told of a program called ROBAL that matches this 
description. Anyone heard of this?

thanx.

kuopei.714398410@milton          aka steve 
Newsgroups: sci.engr.mech
From: rfedkiw@crenshaw.math.ucla.edu (Ronald Fedkiw)
Subject: Axisymmetric Navier Stokes Equations
Organization: UCLA Mathematics Department
Distribution: usa
Date: Sun, 16 Aug 92 21:25:32 GMT

I'm trying to do a calculation of the full compressible Navier Stokes
equations for flow past an axisymmetric blunt body.
So, I put the equations into axisymmetric form and multiply
through by 1/Jacobian = r = distance from centerline (of axisymmetry).
I need to do this to put the equations back into conservative form for 
my method.
The obvious problem is that the equations are no longer valid along
the axis of symmetry (where r = 0). The Jacobian here is infinite.
I'm not quite sure what the implications of an infinite Jacobian are,
but from looking at my equations it becomes obvious that they cannot 
be used to solve the flowfield at r=0.

I was wondering what sorts of methods ae in common practice to solve
for the flowfield near r=0.
The solution is important here since this is where the flow passes
through the strongest portion of the shockwave. (It's a normal shock
at r=0 and the heating is high, also this is the where the stagnation
streamline lies.)
So, I need a good method, this might be the most important part of the flow!

Any help is greatly appreciated.

(I've thought about bounding the domain of the grid away from r=0,
 by 1/2 of a grid cell, but what boundry condition would I use?)

Ron Fedkiw

--
Ron Fedkiw (rfedkiw@redwood.math.ucla.edu)

A plan is made by someone who is sitting and thinking ...
while others are doing.
Newsgroups: sci.engr.mech,sci.engr
From: ziggy@r-node.gts.org (Adrian Buss  Sys-Op)
Subject: Re: mousetrap racer
Keywords: mousetrap
Organization: Public Access UNIX Information System
Date: Tue, 18 Aug 1992 01:34:39 GMT

In article <1992Aug11.014247.4629@megadata.mega.oz.au> vince@megadata.mega.oz.au (Vince) writes:
>
>I am an undergraduate student studying Manufacturing Engineering at
>the Uni of Technology ,Sydney and need some help with a design project
>
>The class has been asked to design a mouse trap racer
>
> I would appreciate any help/experience from anyone who may have 
>been given this problem (Originated by ASME and sponsored by Telecom
>Australia locally)
>

I alwayes find this kinda strange.  Maybe it is just me but arent you
supposed to come up with the ideas and figure out the problems, or 
solutions to the problems your self.

I know the net is kinda handy but hmmmmmmm not sure ??


adrain

-- 
ziggy@r-node.gts.org         | Have you rubbed noses with an Eskimo today??
ziggy@zooid.guild.org        | My inability to spell and gramatize are no
adrian@skypod.guild.org      | reflection on the GENERAL CANADIAN intelligence!!
From: gt5404b@prism.gatech.EDU (Thomas Nord)
Newsgroups: sci.engr.mech
Subject: Re: Aero/Astro Vs. Mech E.
Date: 12 Aug 92 19:07:11 GMT
Organization: Ramblin' Wrecks from Georgia Tech

In article <11AUG199221042579@zeus.tamu.edu> cjs1722@zeus.tamu.edu (STEPANIAN, CHRISTOPHER JOHN) writes:
>In article <1992Aug11.061620.1218@leland.Stanford.EDU>, stanford@leland.Stanford.EDU (Scott Stanford) writes...
>>In article <1992Aug7.132000.21293@athena.mit.edu> cid@athena.mit.edu (Derek H Cedillo) writes:
>>>
>>>I hope Im not being bothersome, but I am coming upon a tough decision.
>>>Its Major Declaration time, and while I have already declared Mech E.
>>>I am having doubts.  My love is Aircraft.  I am currently a GE Aircraft
>>>Engines Intern.  Would I have  job if I went Aero/Astro?  Would
>> 
>>Damn good question - I was thinking of AA as well (another kid who
>>loves airplanes but whose eyes suck and can't be a pilot).  I decided
>>on ME for a few reasons.
>> 
>>Scott Stanford
>>Senior in ME and Music @ Stanford
>>stanford@leland.stanford.edu
>> 
> My background is in mech eng but my first real job was in an aerospace
> company doing composites. The aero major is not a necessity for doing 
> cool stuff (things that go fast, and explode). I liked Mech because of
> the diversity of interests it covers - fluids, heat transfer, acoustics,
> composites, elasticity, etc... That sold if for me!
>
>Chris Stepanian
>Depts of Ocean and Aerospace Engineering
>Texas A&M University

	I agree with Chris, I am a graduating senior at Ga. Tech in
Mechanical Engineering. In my experience here and looking at both the
Aero and Mech curriculums, Aero is just a specialized division of
Mechanical Engineering. With Mechanical, you get such a broad base of
topics as Chris mentioned above. It is very risky, especially with the
recession and the budget cutbacks to specialize in Aero and get stuck.
	I love flying things too. But it is not hard to get a job in
an Aero type company with a Mech degree. A friend of mine who
graduated last quarter is now working at McDonnell Douglas in St.
Louis. She is working on the wing structure for the F/A - 18 Hornet.
Another friend of mine is going to start a job at Pratt & Whitney
Govt. Engines Division working on the new engines for the F-22. I
co-oped at Teledyne CAE in Gainesville, Ga. (before they lost their
contract and closed) working on small gas turbine engines for the
Tomahawk and Harpoon Cruise missiles. So getting a job in an Aero
market is not impossible for a person with a Mech degree. 
	In the long run as far as flexibilty within the workplace and
broad knowledge, Mech is the way to go. You do most of your
specialization in the workplace anyway. 

	Good Luck!
	Tom     

Thomas Nord	Graduating Senior, Mechanical Eng., Ga. Tech

gt5404b@prism.gatech.edu
 
Newsgroups: sci.engr.mech
From: seaney@robios.me.wisc.edu (Steve Seaney)
Subject: Power and Torque Curves for Ford 4.6L Sought
Organization: U. Wisconsin-Madison, Robotics Laboratory
Distribution: sci
Date: 15 Aug 92 10:04:24


I need to get the power and torque curves for a Ford 4.6L engine.
Is there a customer service bulletin or number that I can call to
request the information?  I've tried a large variety of dealerships..

THanks,
Steve









--
  seaney@cae.wisc.edu        *  University of Wisconsin - Madison             
******************************  Systems Administrator
  608 / 262-5328             *  353 Mechanical Engineering                    
  608 / 262-7463             *  1513 University Avenue                        
  608 / 256-4730             *  Madison, Wisconsin  53706                     
Newsgroups: sci.engr.mech,sci.engr,misc.jobs.offered
From: rr2@cec1.wustl.edu (Rajamiyer Ravichandran)
Subject: Fellowship Opportunity in Structural Mechanics
Organization: Washington University, St. Louis Mo.
Distribution: usa
Date: Thu, 13 Aug 1992 20:21:07 GMT




           FELLOWSHIP  OPPORTUNITY  IN STRUCTURAL  MECHANICS
          --------------------------------------------------


	A fellowship for a duration of three years is available for advanced 
work in the field of "Composite Structural Mechanics" in the department of 
Civil Engineering, Washington University in St. Louis. The fellowship would pay a monthly stipend not less than $ 1500 a month and full tution. 
Only U.S. Citizens are eligible. We are seeking a Civil or Mechanical 
Engineering graduate student interested in pursuing a doctoral program. 

	The fellowship is awarded by the Office of Naval Research undr the 
EPSCoR ( Experimental Program to Stimulate Competitive Research) and is attached
to a parent ONR Grant awarded to Professor S. Sridharan. 


	Interested candidates please contat either

        Ms. Sonya Reed @ (314)-935-6303   Or
        Prof. S. Sridharan (314)-935-6348.

Mailing Address:

		Department of Civil Engineering
		Campus Box 1130
		Washington University
		St. Louis, MO 63130.



Note:  Please do not email your responses to my account. I am only posting this
       on behalf of Prof. Sridharan.




Newsgroups: sci.engr.mech
From: cjs1722@zeus.tamu.edu (STEPANIAN, CHRISTOPHER JOHN)
Subject: Re: Looking for CFD Pointers
News-Software: VAX/VMS VNEWS 1.41    
Organization: Texas A&M University, Academic Computing Services
Date: Mon, 17 Aug 1992 03:38:00 GMT

In article <1992Aug13.182029.16905@fs7.ece.cmu.edu>, winstead@faraday.ece.cmu.edu (Charles Holden Winstead) writes...
>Hey All,
> 
>I'm interested in learning how to numerically solve the incompressible 
>Navier-Stokes equations, 2D.  My goal is to program my own solver.  I've
>looked into formulating this myself using Finite Elements, but I was wondering
>if there's a standard, accepted method for solving these.  I'm interested in
>any references or suggestions.
> 
>Thanks,
> 
>-Chuck

Chuck, 

	One of my graduate advisors is a hydrodynamics guy who does a lot 
of computational solving of 3-d, integrated, flow past a body type problems.
If I remember correctly, the most popular way to solve to problem is by 
boundry elements. The second most popular method is by using finite elements.
Check your school library for some tomes on the topic. My research is
, unfortunately, finite elements so I can't make a recomendation on a 
good book title. I think the cfd folks used some expensive Springer-Verlag
set - lots of grumbles(too expensive). 

good luck!

ps the basic code should already exist, if you want it with less pain!!!


--------------------------------------------------------------------------------
Chris Stepanian			|"...a funny thing about regret is, that it's
Depts of Aero&Ocean Engineering	|    better to regret something you have done
Texas A&M University		|    than to regret something you haven't done."
CJS1722@ZEUS.TAMU.EDU		|			B.H. Surfers
--------------------------------------------------------------------------------

Newsgroups: sci.engr.mech
From: cid@athena.mit.edu (Derek H Cedillo)
Subject: all earing Slip due to Gyroscopic moment
Organization: Massachusetts Institute of Technology
Date: Thu, 13 Aug 1992 16:02:25 GMT



First of all, thanks to everyone who responded to 
my Mech E vs aero question.
Im going to go ME and dabble in aerodynamcs, and Aerospace structures.
now for the big part.

I need some inof On the above topic.
Im working on a new Under Race Lube system (URL)
for High speed ball bearings.  I want to compare
results with Jet Lube with regards to 
Gyroscopic Slip.
I have calculated the slip at various loads and sppeds.
What I need is an accurate description of how theplot
of Gyro Moment Vs. Thrust turns out.
What Poplawski came out with in 1965 AsmE paper, doesnt correlate
with oure data.  Although we follow his method of calculating the
moment.  We get a sinusiodal curve where as he gets
a peaked curve that looks like a vibration plot of critical damping.
Any info on where I might be able to find some references would
really be appreciated.  Ive spent 3 days in the library, and
although everyone mentins the Gyro Moment, no one explains
the ralation.

Thanks


Derek
From: billc@Apple.COM (Bill Cockayne)
Newsgroups: sci.engr.mech
Subject: Big .vs. little
Keywords: prestige
Date: 22 Aug 92 05:11:23 GMT
Organization: Apple Computer Inc., Cupertino, CA


I recently attended a Rather small school as a Mechanical Engr. The school is
Villanova University (outside Philly) with a undergrad student body around
6500 (rough).

I also had the luck of attending VA Tech for a short while before transferring
to VU. One of the reasons I transferred was because of the size of Tech, very
close to NCSU I think.

After having looked around and seeing what other universities are like, and
pushing the envelope at Villanova with respect to technology, here are some
things I found:

1) Neither bigger nor smaller is inherently "better."
2) Bigger tends to have more money to put towards equipment, but that does not
mean that the equipment can be used by everyone, or is any better supported.
3) There is better opportunities for rapport with faculty at smaller b/c of
the size, and this can help when you are looking for faculty recommendations.
All of my interning during school was based on getting recommendations fromfaculty (as well as just being in the right place at the right time.)
4) Bigger does not mean more name recognition within the ME dept. Sometimes
small schools have better respected departments when it comes to the industry.
5) THE MOST IMPORTANT POINT (in my mind)...if you like the school, stay with
it. If, for some reason the school (or people, area, dept.) are deterring or
interfering with your academic achievement, find a new school. I am not for
jumping from school to school but I believe that you can achieve more at a
school you like than one that is "great" in ME.
        When I went into school (a measley 4 years ago) there was supposed to
be this huge demand for engineers when I graduated. Just stick out the program
and you will have a good job in return for your work. Excel, and you were
supposed to be guaranteed an interesting and fulfilling job. At this moment
only about 25% of my class has jobs. The rest (many of them at the top of the
class and with awards beyond imagination) are sitting at home trying 
desperately to find any type of engr job.
        Of those that do have jobs, only about 50% are happy with the jobs they
got, the rest took the only jobs they were offered.

        Stay in school, learn new things, meet new people, delve into
areas that you wouldn't normally look at, but keep in mind to HAVE FUN.

bill cockayne
billc@apple.com

Newsgroups: sci.engr.mech
From: winstead@faraday.ece.cmu.edu (Charles Holden Winstead)
Subject: Looking for CFD Pointers
Organization: Electrical and Computer Engineering, Carnegie Mellon
Date: Thu, 13 Aug 1992 18:20:29 GMT

Hey All,

I'm interested in learning how to numerically solve the incompressible 
Navier-Stokes equations, 2D.  My goal is to program my own solver.  I've
looked into formulating this myself using Finite Elements, but I was wondering
if there's a standard, accepted method for solving these.  I'm interested in
any references or suggestions.

Thanks,

-Chuck

Newsgroups: sci.engr.mech
From: jmcocker@eos.ncsu.edu (Mitch)
Subject: College Advice needed!
Originator: jmcocker@c00581-1403br.eos.ncsu.edu
Keywords: Big School, Little School, Employers, BSME
Reply-To: jmcocker@eos.ncsu.edu
Organization: North Carolina State University, Project Eos
Date: Fri, 21 Aug 1992 19:40:20 GMT


Hello all,

I've got a question I wish to ask of NetWisdom:  what is the value of attending
a large university?

Right now, I'm a sophomore at North Carolina State University, which has a
student body of about 35,000.  That's a rough estimate, but close.  I started
out in Aerospace engineering, but I am now majoring in Mechanical engineering.
I am sure that I will have a career in engineering, probably in some field
that will allow me to work in space exploration and/or the industries involved
in space technology.  I think a degree in mechanical engineering will prepare
me for this, though specialization will come a bit later.

With that background info out of the way, I will move on to the main thrust of
this post.  The size of this University has many pros and cons, for example:
NC State has an good Mechanical Engineering program because, among other things,
it can afford to pay for a good program.  However, the sheer size of the
student body has given rise to a largely uncaring student housing bureaucracy,
which in turn makes it difficult to take advantage of the benefits of the State
Mech.E program.  

Now, I know of some smaller colleges that offer a Mechanical
Engineering Degree (Bachelor's), such as the University of North Carolina at
Charlotte, and I am wondering why should I wrestle with the problems a student
body of monstrous size causes, when I could get the same degree at a college
that does not have those problems?

This question is directed mainly at mechanical engineers who are already out of
school, and working.  I have heard that going to a large university is a good
idea because of name recognition when interviewing with prospective employers.
Can anyone out there confirm or deny this?  I plan on participating in a 
co-operative education program wherever I am, in the hopes that this will better
my chances of finding employment when I graduate.  Would co-opping (cooping?)
offset the need for "name recognition?"

I hate to take up bandwidth with this, but it's the only way I know of to put
these questions to people who Know What The Hell They Are Talking About.  I am
loathe to ask this sort of thing to anyone on campus: the students are just as
clueless as I am, and the faculty, while not on my personal payroll, are paid
because students _do_ attend this university, and wouldn't dare badmouth the
source (NCSU) of their employment.

So, if any mechanical engineers out there who are now or have at some time been
employed in the field they trained for can spare a few moments, I'd really
appreciate any advice you could give.  Just e-mail me at the address below; I
won't take up any more space with this.

Thanks in advance,

Mitch --------------->  E-Mail at : jmcocker@eos.ncsu.edu
From: lind@eng.umd.edu (Charles A. Lind)
Newsgroups: sci.engr.mech
Subject: Re: Looking for CFD Pointers
Date: 14 Aug 92 14:45:20 GMT
Organization: College of Engineering, University of Maryland, College Park
Originator: lind@valkyrie.eng.umd.edu


In article <1992Aug13.182029.16905@fs7.ece.cmu.edu>, winstead@faraday.ece.cmu.edu (Charles Holden Winstead) writes:
>Hey All,
>
>I'm interested in learning how to numerically solve the incompressible 
>Navier-Stokes equations, 2D.  My goal is to program my own solver.  I've
>looked into formulating this myself using Finite Elements, but I was wondering
>if there's a standard, accepted method for solving these.  I'm interested in
>any references or suggestions.
>
>Thanks,
>
>-Chuck

The best introductory book, IMHO, is a book by Hoffmann with a title to
the tune of ' Computational Fluid Dynamics for Scientists and Engineers'.

Charles
From: chenye@gn.ecn.purdue.edu (YM Chen)
Newsgroups: sci.engr.mech
Subject: ABAQUS on dynamic crack propagation?
Date: 13 Aug 92 02:01:42 GMT
Organization: Purdue University Engineering Computer Network

Hello netter,

Recently, my research has some troubles:

I am using ABAQUS finite element code to solve a dynamic
crack propagation problem of brittle materials.  The question
is that after running the ABAQUS for some time, the crack tip
stress intensity factor reaches to it critical value and the
crack tip has to move forward a node or two.  From this point,
the ABAQUS gives me some wrong results.  I figure I gave
the ABAQUS incorrect difinition of nodal force release information,
but I don't know how to set the correct ones.

If there is anyone who is familiar with ABAQUS code, I would like
to hear from you.  Any help will be appreciated.

Thanks in advance.

Yenmeng

-- 
chenye@ecn.purdue.edu
Phone: (317) 743-5194 (home)
       (317) 494-7648 (office)
------------------------------------------------------------------------
Newsgroups: sci.engr.mech
From: fsjrs@oz.lerc.nasa.gov (John Schwab)
Subject: Re: Looking for CFD Pointers
Organization: NASA Lewis Research Center
Date: Fri, 14 Aug 1992 18:40:33 GMT

In article <1992Aug13.182029.16905@fs7.ece.cmu.edu>, winstead@faraday.ece.cmu.edu (Charles Holden Winstead) writes:
> Hey All,
> 
> I'm interested in learning how to numerically solve the incompressible 
> Navier-Stokes equations, 2D.  My goal is to program my own solver.  I've
> looked into formulating this myself using Finite Elements, but I was wondering
> if there's a standard, accepted method for solving these.  I'm interested in
> any references or suggestions.
>
 
Some standard textbooks on CFD:


Anderson, D. A., Tannehill, J. C., and Pletcher, R.H.
Computational Fluid Mechanics and Heat Transfer
Hemisphere Publishing Corporation, 1984
ISBN 0-07-050328-1

Baker, A. J.
Finite Element Computational Fluid Mechanics
Hemisphere Publishing Corporation, 1983
ISBN 0-07-003465-6

Fletcher, C. A. J.
Computational Techniques for Fluid Dynamics, Volume I
Fundamental and General Techniques
Springer-Verlag, 1988
ISBN 

Fletcher, C. A. J.
Computational Techniques for Fluid Dynamics, Volume II
Specific Techniques for Different Flow Categories
Springer-Verlag, 1988
ISBN 0-387-18759-6

Hirsch, C.
Numerical Computation of Internal and External Flows, Volume 1
Fundamentals of Numerical Discretization
John Wiley & Sons, 1989
ISBN 0-471-92385-0 

Hirsch, C.
Numerical Computation of Internal and External Flows, Volume 2
Compuattional Methods for Inviscid and Viscous Flows
John Wiley & Sons, 1990
ISBN 0-471-92452-0 

Hoffmann, K. A.
Computational Fluid Dynamics for Engineers
Engineering Education System, 1989
ISBN 0-9623731-4-1

Holt, M.
Numerical Methods in Fluid Mechanics, Second Edition
Springer-Verlag, 1984
ISBN 0-387-12799-2

Patankar, S. V.
Numerical Heat Transfer and Fluid Flow
Hemisphere Publishing Corporation, 1980
ISBN 0-07-048740-5

Peyret, R., and Taylor, T. D.
Computational Methods for Fluid Flow
Springer-Verlag, 1983
ISBN 0-387-13851-X

Roach, P. J.
Computational Fluid Dynamics
Hermosa Press, 1982
ISBN 0-913478-05-9
- 
John R. Schwab
NASA Lewis Research Center
Phone: (216) 433-8446
Email: schwab@lerc.nasa.gov
Newsgroups: sci.engr,sci.engr.chem,sci.research,sci.energy