Benjamin Franklin & CFD - Cham

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Philadelphia CFD ConferenceCFD and the dead-water effect;the Maas-Hornby investigationApril 2010The dead-water effect has been simulated in small-scale laboratoryexperiments by Dr LRM Maas of the Netherlands Sea Research Institute,and in 3Dtransient CFDcalculations byDr Bob Hornbyin the UK.Experiment 16.66sSimulation 17s, centreplaneModel shipThe agreement betweenexperiments andcalculations was excellent,as of course it should be;for turbulence played nosignificant role.Simulation 17s, tankwallwallGravity waves at density-discontinuityI think that Benjamin Franklin would have admired this investigation; forit possesses what he called „a certain charming quality…. SIMPLICITY’.
Philadelphia CFD ConferenceCombustion, turbulence and CFD;Benjamin Frankln‟s contributionsApril 2010One of Benjamin Franklin‟s many interests was combustion,both scientific and practical. He corresponded with JosephPriestley, the English discoverer of oxygen (the Swede Scheeledid so earlier); and he watched Antoine Lavoisier demonstratecharcoal burning in „de-phlogisticated‟ air.On the practical side, he invented an improved oilburninglamp; for he had seen that the earlier globeshapedlamp allowed too little air to enter and so becamequickly blackened by smoke. His lantern‟s plane-glasssides facilitated air entry; and so remained clean.The flows of air, heat and combustion products,were his main concerns when he urged replacingopen fire-places, which lost much heat to the outsidewall, by a stove in the centre of the room.I follow Franklin by bringing combustion into thecentre of the CFD stage; for it can teach us much.
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Benjamin Franklin & CFD - Cham

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