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Figure 5


Fig. 5. The concentration boundary layer (CBL) thickness ({delta}CBL) at the upstream and downstream locations of Vallisneria spiralis and Vallisneria americana in a flat and twisted configuration. (A) and (B) are the {delta}CBL vs the freestream velocity (U) and the local Reynolds number (Rex), respectively, at 17.1 mmol m–3 CO2. (C,D) The {delta}CBL vs the U and Rex, respectively, at 1.71 mmol m–3 CO2; (E,F) diffusive sublayer thickness ({delta}DSL) determined from hydrodynamic measurements vs U and Rex, respectively. The thick and thin solid lines indicate the theoretical {delta}CBL (A–D) and the theoretical {delta}DSL at the upstream and downstream locations (E,F), respectively.





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