Abstract
The present study investigates fluid flow interaction between porous and non-porous regions in a channel partially filled with a porous block. For this purpose, a detailed pore-scale large eddy simulation is utilized. Flow visualization shows that some portion of the fluid entering the porous blocks is pushed upwards to the porous-fluid interface and leaves the porous region; this phenomenon is called flow leakage. Spectral analysis of vertical velocity and correlation coefficients confirm the flow leakage. Below the porous interface, the magnitude of correlation coefficients exposes a strong positive correlation between vertical velocity fluctuations that reveals the upward tendency of flow in the porous region. This trend is also observed across the porous interface which confirms momentum transfer through the porous interface. Moreover, spectral analysis of vertical velocity reveals that the dominant frequencies within the porous region exist in the non-porous region where the flow leakage is pronounced. This observation shows strong momentum transfer between the porous and non-porous regions due to the flow leakage.
| Original language | English |
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| Publication status | Published - 17 Jan 2021 |
| Event | Proceedings of the 7th World Congress on Momentum, Heat and Mass Transfer (MHMT'22) - Portugal, Lisbon Duration: 7 Apr 2022 → 9 Apr 2022 https://mhmtcongress.com |
Conference
| Conference | Proceedings of the 7th World Congress on Momentum, Heat and Mass Transfer (MHMT'22) |
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| City | Lisbon |
| Period | 7/04/22 → 9/04/22 |
| Internet address |
Keywords
- Porous flow
- Flow leakage
- Large eddy simulation
- spectral analysis
- correlation coefficient