2013 Lubbock Lecture - Phoenics

More documents

Recommendations

Info

24/35. Present grid trends:More-advanced XcellLubbock,TexasOct 18 2013Applications of CFDCartesian sub-divided gridscan also be ‘triangularised’: seeright.Not all cells need to be‘triangularised’; only those wherescalar gradients are large.In another version of Xcell, velocities are also storedat triangle centroids. This is ‘semi-collocated’ Xcell.Because pressures and velocities are not stored atthe same points, it is free from the ‘checker-boarding’ailment of conventionally collocated grids.What might be termed a ‘smart-grid’ technology isemerging which is ‘solution adaptive’.
25/35. Present: turbulence-modeltrends in terms ofhow many population membersLubbock,TexasOct 18 2013Applications of CFDVariables of popular turbulence models, e.g. k-e, LES,are local averages; implied population has 1 member.Eddy-break-up model for combustion (1971) is most-used2-member example. Population theory is not new.Only 2-(or more)-member-population models canrepresent chemical reaction, swirling-flows, and unmixing.The next three slides concern an un-mixingexperiment, first performed in 1978, which no 1-member (i.e. conventional) model has ever been ableto simulate.Will any one accept the challenge?
Page 1 and 2: 1/35. Past, present & future ofCFD:
Page 3 and 4: 3/35. The Past: Is the pre-digitalm
Page 5 and 6: 5/35. The Past at IC MED:Features o
Page 7 and 8: 7/35. The Past at IC MED:SIVA, SIMP
Page 9: 9/35. The Past at IC MED:More about
Page 16: 16/35. Pressure distribution in gas
Page 19 and 20: 19/35. Present trends:grids for arb
Page 21 and 22: 21/35. Present trends:SPARSOL (Stru
Page 23: 23/35. Present grid trends:How Xcel
Page 27 and 28: 27/35. Turbulence trends:Mixing fol
Page 29 and 30: 29/35. The future - perhaps.Models
Page 31 and 32: 31/35. The future - perhapsWill gen
Page 33 and 34: 33/35. The future - perhaps:Partial
Page 35: 35/35. The future - perhaps:Terrest

2013 Lubbock Lecture - Phoenics

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?