Результаты поиска по 'porous cylindrical cavity':
Найдено статей: 2
  1. Trifonova T.A., Sheremet M.A.
    Numerical simulation of unsteady conjugate natural convection in a cylindrical porous domain (Darcy–Boussinesq model)
    Computer Research and Modeling, 2013, v. 5, no. 2, pp. 179-191

    Mathematical simulation on unsteady natural convection in a closed porous cylindrical cavity having finite thickness heat-conducting solid walls in conditions of convective heat exchange with an environment has been carried out. A boundary-value problem of mathematical physics formulated in dimensionless variables such as stream function and temperature on the basis of Darcy–Boussinesq model has been solved by finite difference method. Effect of a porous medium permeability 10–5≤Da<∞, ratio between a solid wall thickness and the inner radius of a cylinder 0.1≤h/L≤0.3, a thermal conductivity ratio 1≤λ1,2≤20 and a dimensionless time on both local distributions of isolines and isotherms and integral complexes reflecting an intensity of convective flow and heat transfer has been analyzed in detail.

    Keywords: conjugate heat transfer, natural convection, Darcy–Boussinesq approximation, porous cylindrical cavity, transient regime, numerical simulation.
    Views (last year): 4. Citations: 3 (RSCI).
  2. Trifonova T.A., Sheremet M.A.
    Comparative analysis of Darcy and Brinkman models at studying of transient conjugate natural convection in a porous cylindrical cavity
    Computer Research and Modeling, 2013, v. 5, no. 4, pp. 623-634

    Comparative analysis of two models of porous medium (Dacry and Brinkman) on an example of mathematical simulation of transient natural convection in a porous vertical cylindrical cavity with heat-conducting shell of finite thickness in conditions of convective cooling from an environment has been carried out. The boundary-value problem of mathematical physics formulated in dimensionless variables such as stream function, vorticity and temperature has been solved by implicit finite difference method. The presented verification results validate used numerical approach and also confirm that the solution is not dependent on the mesh size. Features of the conjugate heat transfer problems with considered models of porous medium have been determined.

    Keywords: conjugate heat transfer, natural convection, Darcy–Boussinesq and Brinkman–Boussinesq approximations, porous vertical cylindrical cavity, transient regime, numerical simulation.
    Views (last year): 1. Citations: 4 (RSCI).

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