| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2013: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2012: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
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| Outline of Final Research Achievements |
PIV measurements and numerical simulations of turbulent flows in the interface regions of heterogeneous porous media are performed. For the PIV measurements, we made porous medium of FEP resin whose refractive index is close to that of water to measure flows inside the porous media. Two dimensional turbulent boundary layers over porous media are also measured and simulated to discuss the flow physics totally. As a result, we observed that in the case that the stream-wise and span-wise permeabilities are much lower than the surface-normal one, the normal fluctuation velocity and thus the Reynolds shear stress are damped because of the blocking effects on the vortex motions penetrating inside the porous medium by the saturated fluid inside the porous medium. By the LBM simulations, we discussed the detailed behaviour of the budget terms of the double averaged turbulence equations and constructed Reynolds stress and k-e models for general porous medium flows.
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