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Table 1 Physical quantities and corresponding symbols used in mathematical formulation of conservation equations

From: Development of a theoretical framework for analyzing cerebrospinal fluid dynamics

Physical Quantity Symbol
Fluid mass density ρ
Velocity vector field u
Net mass production rate
Pressure field p
Viscous stress vector τ
Gravitational acceleration g
Control volume acceleration a
Ventricle wall displacement vector δ w
Differential volume element dV
Differential control surface area element dS
Unit outward surface normal vector