Recent content by cruckshank

I've never done a question similar to this one, and I've found myself stuck on it for a while now. I was hoping for some guidance on where to begin, because I truly have no idea: An incompressible fluid flows through a porous cylindrical shell with inner and outer radii R1 and R2, respectively...

I am looking for a Nusselt number correlation that will work for a shell & tube heat exchanger in the Re < 3000 region, i.e. extremely laminar flow (for a lab experiment). I've been searching for a while now, but can only find empirical correlations for Re > 3000, and was thus hoping that...

THERE IS NO TEMPLATE BECAUSE GHIS HOMEWORK WAS PLACED IN AN INCORRECT FORUM Equimolar benzene and and toluene form essentially ideal solutions. At 20degC the vapour of benzene and toluene are 9.866kPa and 2.933kPa respectively. The solution is boiled by reducing the external pressure below the...

Hi, I know this is simple but I'd like someone to clarify for me, because my lecturer wasn't clear: Obviously when the pipes are in parallel, the head losses across them are the same. But what about the total head loss for the parallel pipes as a whole? I have 3 ideas, but I'm not sure which...

Never mind, finally figured it out.

I am struggling with the following problem: A reversible reaction where: CH3COOH + H2O--><--CH3COO- + H3O+ The overall solution initially has a CH3COOH concentration of 0.01mol/L and no acetate. The solution has 0.001mol/L of H3O+. Assume that this is constant throughout the experiment...

Methane gas at 550K, 5 bar is expanded adiabatically and reversibly to 1 bar. Find the final temperature of the gas. I have made little progress with this... I've calculated the initial volume, and that is all so far. Obviously to find the work usually I'd integrate pressure with respect to...

I have a combustion process, and have calculated the net enthalpy of my inlets and outlets. Some of the energy released by the combustion is used to heat a cooling stream, maintained at temperature 46degC. I wish to calculate the power required to maintain this cooling stream temperature: I was...

I haven't heard of either of these methods, and upon looking them up they don't look familiar to me either. I forgot about the viscous force acting on the fluid element I think. Would I represent this using Stoke's Law or some other way? If using Stoke's law would the radius be the pipe radius...

I did a force balance on the horizontal and it came out with that, which I believe is correct? I have no idea about the vertical force balance though.

Yes, along the pipe axis.

The pipe is horizontal in the diagram, sorry should have mentioned that.

"Consider a fully developed laminar flow in a circular pipe, perform force analysis on an element of the real fluid." I've just started this type of question, and I'm a bit confused about where to go from here: I've managed to do a force balance horizontally to show that the partial derivative...

But g isn't constant in this case?

Hi, I've been given a list of heights and corresponding densities of air at these heights. I'm trying to find an expression for the variation of density with height. From the data, it looks like the density would be equal to some kind of logarithmic relationship? However, I'm not too sure how to...