Simulation of sodium hypochlorite irrigation

5.25% sodium hypochlorite solution was adopted as the irrigation, with density of 1.04 g/cm³ and viscosity of 1.3 × 10⁻³ Pa*s [20 (link)]. The surfaces of the needle and root canal were regarded as rigid, impermeable walls, and a non-slip boundary condition was adopted in the simulation. The k-ω SST turbulence model that had been validated in our earlier studies was used [11 (link), 21 (link)]. Similar to the commonly used clinical irrigation flow of 0.26 mL/s [5 (link), 22 (link)], an inflow velocity of 8.6 m/s was adopted so that the effect of different working depths and root canal curvatures could readily be evaluated. Numerical simulation was carried out with software Ansys Fluent 18.1 (ANSYS Inc., Canonsburg, PA, USA).

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Yu M., Li Y., Zhao M., Huang Z., Zhou N, & Jin H. (2024). Computational fluid dynamics investigation on the irrigation of a real root canal with a side-vented needle. BMC Oral Health, 24, 321.

Publication 2024

Ansys Fluent 18.1

Corresponding Organization :

Other organizations : China Jiliang University, Nanjing University of Aeronautics and Astronautics, Zhejiang University, Stomatology Hospital

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Variable analysis

independent variables

Working depth of the needle
Root canal curvature

dependent variables

Fluid dynamics (e.g., flow patterns, velocity, shear stress)

control variables

Sodium hypochlorite solution with 5.25% concentration, density of 1.04 g/cm^3, and viscosity of 1.3 × 10^-3 Pa*s
Rigid, impermeable walls for the needle and root canal surfaces
Non-slip boundary condition
K-ω SST turbulence model
Inflow velocity of 8.6 m/s
Numerical simulation using Ansys Fluent 18.1 software

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