Pierre, would you mind showing your calculations to that effect? Attached is the Friedel correlation spreadsheet. I've also checked online Friedel calculators against the spreadsheet, and had relatively good agreement. For fun, I also checked pure steam table correlations, and found similar...
Greg,
That was a main question. The end of the tailpipe will vent outside the building (above the roof), and will be well away from any workers. I guess my questions was this: Is the noise calculation taken as the sound level at the discharge point of the tailpipe, or is there inherent noise at...
I have a vessel with MAWP of 50 psig, with relief case required of 920 lb/hr of steam. I've selected a Kunkle 910-series, with rated capacity of 1,062 lb/hr steam. The PSV will be directly mounted on the tank nozzle, and will discharge through a tailpipe. The tailpipe exact routing is TBD, as we...
Pavan,
I think LI's point about pipe ordering means that you don't order pipe with a nominal size and a specified thickness (unless you want a horrendously expensive custom pipe). Instead, you get a minimum thickness from design equations, then find the next thickness up, and order that...
Think about it this way. Shear stress is proportional to the differential velocity as a function of r (the du/dy term). Microscopically, the shell is immobile, and the surface molecules of the shell are being "pulled" (or pushed, if you want to think about the layer-to-layer friction that way)...
Best case has a near 0-0 intercept on the green line (stress-shear curve). That tells me it's a standard shear thinning fluid (shear thinning due to the clear viscosity drop with shear rate. The worst case has a non-zero, but still small stress intercept near 15 ish Pa (this is called the yield...
Farmer,
There were two points to the exercise. Firstly, to get an idea of your flow profile shape. I think it's pretty clear that you have, as you initially suspected, a "pluglike" flow of faster core material with a shell of slow/sluggish material.
Secondly, for your worst case material, it...
Farmer,
Look to see my note above (Notation correction: In the last part of my prior post, the picture for velocity profile includes mu and K. The author of that paper denoted K as the dP/dz, and used mu for what I called "K". Just an FYI, as the math won't math out otherwise. If you know what...
Notation correction: In the last part of my prior post, the picture for velocity profile includes mu and K. The author of that paper denoted K as the dP/dz, and used mu for what I called "K". Just an FYI, as the math won't math out otherwise. If you know what pressure drop you are getting...
Also, if you do the steps above, make sure to graph velocity, v, versus r (distance from center). This will give you a velocity profile in your pipe. Give the extreme shear-thinning nature here, I would expect to see velocity drop off from the center and very quickly approach 0.
You won't ever...
OP, since you have a rheology profile for your liquid, follow the below steps to get an equation that describes your fluid. Based on your graph, I would say your material is simply shear thinning, not a Bingham plastic, though starting out at a really high 0-shear of >1,000,000 cP.
Ostwald-de...
To be honest, the only time I've seen UA calculated as a whole unit is on existing heat exchangers where you need to track fouling over time. Since the A is fixed, you don't really need to look up the area on each individual heat exchanger. Instead, you divide the heat load by the LMTD to get...
I think OP means chlorine gas, which can indeed permeate through PTFE material. The mechanism by which this occurs is periodic substitution of a F with a Cl on the polymer chain. Though F affinity is higher, it can be substituted by a Cl. Since F affinity is higher, it will return to kick the Cl...
