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OUTFLOW BOUNDARY CONDITION IN THE FINITE-VOLUME METHOD FOR UNSTEADY-STATE FLUID FLOW COMPUTATION WITH VARIABLE DENSITY

Volume 3, Issue 6, 2011, pp. 531-537
DOI: 10.1615/ComputThermalScien.2012003330
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ABSTRACT

This paper presents the outflow boundary condition for unsteady-state fluid flow computations with variable density as part of the semi-implicit method for pressure-linked equations (SIMPLE) calculation in the finite-volume method. In the SIMPLE algorithm, there is no built-in numerical procedure to calculate the velocities at an outflow boundary. The outflow boundary condition is meant to satisfy the mass flow rate between the inflow and outflow boundary conditions and the sum of all transient terms over the entire computational domain. When the proposed outflow boundary condition for unsteady-state computations is applied to a thermal fluid flow calculation, stable, robust, and highly accurate mass conservation is obtained compared with that obtained for steady-state calculations. Therefore, the proposed outflow boundary condition is expected to have wide applicability in unsteady-state fluid flow computations with variable density, such as in combustion calculations.

CITED BY
  1. Asako Yutaka, Faghri Mohammad, Modification of SIMPLE algorithm to handle natural convection flows with zero-isothermal compressibility, International Journal of Heat and Mass Transfer, 106, 2017. Crossref

  2. Soma Tatsuya, Amemiya Shun, Katayama Tomoyuki, Saito Yasuhiro, Matsushita Yohsuke, Aoki Hideyuki, Inamura Takao, Daikoku Masatoshi, Fukuno Junichi, Numerical Simulations of Particle-Laden Turbulent Flows to Characterize the Two Different Types of Paint Spray; Bell-Cup Atomizer and Powder Spray Gun, Journal of Chemical Engineering of Japan, 50, 4, 2017. Crossref

  3. Shigeta Masaya, Modeling and simulation of a turbulent‐like thermal plasma jet for nanopowder production, IEEJ Transactions on Electrical and Electronic Engineering, 14, 1, 2019. Crossref

  4. Asako Yutaka, Faghri Mohammad, Tan Lit Ken, Che Sidik Nor Azwadi bin, Outflow velocity for SIMPLE algorithm for unsteady forced convection flows with variable density, International Communications in Heat and Mass Transfer, 92, 2018. Crossref

  5. Shigeta Masaya, Tanaka Manabu, Ghedini Emanuele, Numerical Analysis of the Correlation between Arc Plasma Fluctuation and Nanoparticle Growth–Transport under Atmospheric Pressure, Nanomaterials, 9, 12, 2019. Crossref

  6. Akaotsu Shota, Ozawa Ryoma, Matsushita Yohsuke, Aoki Hideyuki, Malalasekera Weeratunge, Effects of infinitely fast chemistry on combustion behavior of coaxial diffusion flame predicted by large eddy simulation, Fuel Processing Technology, 199, 2020. Crossref

  7. Yokoi Satoki, Matsukawa Yoshiya, Saito Yasuhiro, Matsushita Yohsuke, Aoki Hideyuki, Malalasekera Weeratunge, A Modified Boundary Condition of Velocity for Continuity Equation with Non-uniform Density Distribution at Outlet Boundary Plane, JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 51, 8, 2018. Crossref

  8. Shigeta Masaya, Simulating Turbulent Thermal Plasma Flows for Nanopowder Fabrication, Plasma Chemistry and Plasma Processing, 40, 3, 2020. Crossref

  9. Akaotsu Shota, Matsushita Yohsuke, Aoki Hideyuki, Malalasekera Weeratunge, Application of flamelet/progress-variable approach to the large eddy simulation of a turbulent jet flame of pulverized coals, Advanced Powder Technology, 31, 10, 2020. Crossref

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