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Table 2

Boundary flow characteristics of Figure 4.

Symbol description Closed & const-pressure, r eD [Ω] = r eD [Θ]
κ[Θ] > κ[Ω] κ[Ω] > κ[Θ]
Model sketch
Identifiable window
Response behavior ④Strong CBF: unit slope ④Strong CpBF: const slope (−2.5 is its limit)
⑤Weak CpBF: const pressure L = L 0/κ[Ω] ⑤Weak CBF: unit slope
⑥Strong CpBF: const pressure L = L 0/κ[Ω]

Where κ[Ω] is the permeability ratio of const-pressure layer, L 0 is the pressure value when the κ[Ω] = 1.

Notes: “CBF” is Closed Boundary Flow and “CpBF” is the Const-Pressure Boundary Flow. “Strong” indicates the boundary layer is the main-flow layer, and “Weak” indicates the boundary layer is the non-main-flow layer.

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