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I just got out from a pretty interesting seminar on fuel mixing and combustion. Why would I be interested in something like that? Well, the research was done using the program I was using, for one, plus I did some research on multiphase flow at some point in my college career.
Anyway, here's the details. The talk was given by Steven Frankel of Purdue University, and the topic involves LES, mixing, and combustion. Now, for many researches, LES itself might take months of simulation to yield acceptable results (like the high Reynolds' number simulations we are running), but adding mixing and chemical reaction (combustion)? All I can say is that it would present a extremely complicated problem to solve.
The good thing, I guess, is that they are running at an fairly small Reynolds' number, just around 16,000 from what I remember (well, it's small comparing to the 300,000 we are trying to do), and the bulk of the seminar was concentrated on the new mixing-distribution function they were testing out. I was sort of shocked to see the complexity of the equations, since so many different reactions are involved, it is no longer the simple Navier-Stokes equation that we use for regular flow simulation. Involved parameter includes three dimensions for velocity, temperature, and at least three species of chemicals for combustion (and could be a lot more in a more realistic situation).
Either way, the presentation was on an ongoing research, and hopefully the simulation result could be validated by the experimental data. Below is the link to Professor Steve Frankel's website for those who's interested, i.e. want to fry their brain. (actually there's a couple of cool movies on it, should be fun to watch.)
http://ristretto.ecn.purdue.edu/
p.s. CFD, which is the topic I'm working on, means "Computational Fluid Dynamics", but can be Backronymed as "Cannot Find Drag" (as CFD simulation does not involve drag calculation), "Colorful Fluid Dynamics", " Colorful Figure Display", etc.
Anyway, here's the details. The talk was given by Steven Frankel of Purdue University, and the topic involves LES, mixing, and combustion. Now, for many researches, LES itself might take months of simulation to yield acceptable results (like the high Reynolds' number simulations we are running), but adding mixing and chemical reaction (combustion)? All I can say is that it would present a extremely complicated problem to solve.
The good thing, I guess, is that they are running at an fairly small Reynolds' number, just around 16,000 from what I remember (well, it's small comparing to the 300,000 we are trying to do), and the bulk of the seminar was concentrated on the new mixing-distribution function they were testing out. I was sort of shocked to see the complexity of the equations, since so many different reactions are involved, it is no longer the simple Navier-Stokes equation that we use for regular flow simulation. Involved parameter includes three dimensions for velocity, temperature, and at least three species of chemicals for combustion (and could be a lot more in a more realistic situation).
Either way, the presentation was on an ongoing research, and hopefully the simulation result could be validated by the experimental data. Below is the link to Professor Steve Frankel's website for those who's interested, i.e. want to fry their brain. (actually there's a couple of cool movies on it, should be fun to watch.)
http://ristretto.ecn.purdue.edu/
p.s. CFD, which is the topic I'm working on, means "Computational Fluid Dynamics", but can be Backronymed as "Cannot Find Drag" (as CFD simulation does not involve drag calculation), "Colorful Fluid Dynamics", " Colorful Figure Display", etc.
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