Asmenut,
I went to a seminar this summer where someone gave a talk on this approach, starting with "Voice of the Customer", numerical "experiments" to create a response surface, Monte Carlo analysis of all the tolerances for all the variables, and genetic algorithms for...
There are two products that I know of, both Excel add-ins: @Risk and Crystal Ball. Never had the occasion to actually use either of them, but have seen demos.
Biber Thermal Design
www.biberthermal.com
Or you can use an effective radiant heat transfer coefficient. It avoids the iterative solution that's accurate enough for most purposes if the temperature differences aren't too large (50 C?).
http://www.coolingzone.com/Guest/News/NL_JULY_2001/Cathy/July_cb_2001.html
Try quickbooks.com. I got mine at my local computer & office equipment superstore. It was about $250 if I remember correctly and it'll save you a whole lotta programming...
I use financial software (QuickBooks) to do what you're after -- but probably not to the complexity you need. Plus you'd have to move the database manually if it's in Access... never mind!
Just sad that the "sinking ship" is taking our jobs with it -- jobs that we obviously all like, and that some of us (male and female both) think we're suited for!
Meanwhile, I've heard a lot lately about how there is (or will be) a "shortage" of engineers and scientists ...
Maui,
It's easy to put the verbage out front; much harder to change cultural norms and even unspoken perceptions. I myself can hardly believe that I have caught myself thinking, "Oh, she's blonde, what does she know?" ... immediately before I slapped myself. Now where that could have...
Well, I'm on my own as a mechanical engineer (though not PE), after I got laid off last year. I figured it would be easier to get a few small contracts than a regular job that wouldn't require relocating. That's been true, but the salary hit has been considerable, too. Luckily I'm not the sole...
Check in with Product Design & Engineering shops. Those guys usually love the creative stuff of designing the product, but then wouldn't mind some help with getting the manufacturable models out to the suppliers. Also, they usually hate doing "cables and labels". That might be a niche...
Greg,
I've only been able to do surface contour charts if the x and y axis intervals are evenly spaced. They're not values, they're categories. Have you found a way around that?
Yep, it's clear. As I thought. Just didn't see how that physics could be so simplified into a rule of thumb. I've run into other rules of thumb that weren't based on real physics, though the "flags" they raised were real.
I think an integrated math/physics class -- called something else -- would make sense. Algebra by itself is mind-numbingly boring. Use it to answer questions, and you can see it for the tool that it is.
Amazingly, it took me until **grad school** to realize this relationship!! And only then...
Like PSE, I'm not likely to get licensed, for one simple reason: To get admitted to the test, you have to show increasing responsibility for a project. To me, this means that you are moving towards project management. I hate to do project management. I like the geeky stuff, the analytical...
I don't know about other readers, but when the realization hit me, several months ago, that my type of work is going to be outsourced, it precipitated a real professional identity crisis for me. I am only halfway through my career -- with at least 20 more years to work before I can retire, and...
25362, Can you give the detail behind your 10 atm/deg C number? Seems awfully high to me to be a general number.
I would agree that thermal expansion needs to be taken into account, and the system should be designed to handle the density change as a function of temperature.
fuggeos, the...
My gut tells me it's too long and skinny to get any significant flow through it.
If the channel were open to the atmosphere, it would look like the space between two heat sink fins. There is an optimum spacing for the fins, described at...
Rick,
"Gender should not matter for career and employment purposes."
Yes, yes, yes.
How do we get there?!
Why aren't there many girls in high school math classes?
How do we keep everyone's options open long enough for them to grow into a career choice? Goodness knows, I didn't...
I have written spreadsheets for exactly the situation you describe. You are right, it's pretty straightforward, and I think you could probably write it directly in the worksheet without even needing to go to VB. I can send you a .pdf file of my setup if you want. (Sorry, I can't share the...
