Abstract
The main objective of this work is to study the drainage and imbibition in a capillary tube of circular section in a dimensionless form. First, we have presented the configuration of the studied problem. Equations governing physical problems and methods of resolution are displayed. Second, it demonstrates the dimensionless evolution of the interface and gas pressure as a function of non-dimensional time. Finally, the effect of gravity, the effect of inertia and the influence of gas compressibility and capillary radius are also presented and analyzed.
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Abbreviations
- R :
-
Radius (m)
- m :
-
Mass (kg)
- g :
-
Acceleration due to gravity (m/s2)
- Q inj :
-
Gas volume flow rate (m3/s)
- V s :
-
Gas volume in the Syringe (m3)
- S :
-
Passage section (m2)
- x :
-
Position of the liquid front (m)
- x*:
-
Dimensionless length
- T :
-
Absolute temperature (K)
- r :
-
The specific gas constant (J/K.mol)
- u :
-
Liquid front velocity (m/s)
- u*:
-
Dimensionless velocity
- t :
-
Time (s)
- t*:
-
Dimensionless time
- L :
-
Length variation over time
- L :
-
Length (m)
- F :
-
Force (N)
- P w :
-
Column weight (N)
- Ca :
-
Capillary number, dimensionless
- Fr :
-
Froude number, dimensionless
- Bo :
-
Bond number, dimensionless
- Re:
-
Reynolds number, dimensionless
- P :
-
Pressure (Pa)
- ΔP :
-
Pressure drop (Pa)
- P*:
-
Dimensionless pressure
- x ref :
-
Length characteristic
- t ref :
-
Time characteristic
- u ref :
-
Velocity characteristic
- P ref :
-
Pressure characteristic
- l ini :
-
Initial length (m)
- V ini :
-
Volume of liquid (m3)
- ρ :
-
Density (kg/m3)
- μ :
-
Viscosity of liquid (kg/m s)
- θ :
-
Contact angle (°)
- σ :
-
Surface tension of the silicone oil, (N/m)
- α :
-
Gravitational angle (°)
- l :
-
Liquid
- g :
-
Gas
- c :
-
Capillary
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Bahrini, I., Khemili, F., Abdi Ben Nasrallah, S. et al. Study of Gas–Liquid Interface Displacement in Capillary Driven by Gas Pressurization. Microgravity Sci. Technol. 34, 56 (2022). https://doi.org/10.1007/s12217-022-09967-y
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DOI: https://doi.org/10.1007/s12217-022-09967-y