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  • Development and verification of meshless diffuse approximate method for simulation of single phase, compressible flow in axisymmetry [Elektronski vir]
    Rana, Khush Bakhat ...
    The purpose of the present study is to enable meshless Diffuse Approximate Method (DAM) for simulation of single-phase, Newtonian, compressible flow in axisymmetric geometry. DAM is structured by ... using the second-order polynomial basis functions and the Gaussian weight function, leading to the weighted least squares approximation on overlapping sub-domains. The coupled set of partial differential equations, i.e. mass conservation, momentum conservation, and equation of state, is solved in primitive variables and strong form by using Pressure Implicit with Splitting of Operators (PISO) pressure-velocity coupling on an irregular node arrangement. Implicit time discretization is performed for the predictor step of PISO while in the corrector steps the equations are discretized explicitly. The numerical model is validated for flow in a constant area, axisymmetric tube with helium gas obeying ideal gas law. The solver's accuracy is assessed by investigating the shape of the Gaussian weight and the number of the nodes in the local subdomains. The calculated velocity and pressure fields are compared with Finite Volume Method (FVM) results, obtained by OpenFOAM software. A good agreement has been achieved.The purpose of the present study is to enable meshless Diffuse Approximate Method (DAM) for simulation of single-phase, Newtonian, compressible flow in axisymmetric geometry. DAM is structured by using the second-order polynomial basis functions and the Gaussian weight function, leading to the weighted least squares approximation on overlapping sub-domains. The coupled set of partial differential equations, i.e. mass conservation, momentum conservation, and equation of state, is solved in primitive variables and strong form by using Pressure Implicit with Splitting of Operators (PISO) pressure-velocity coupling on an irregular node arrangement. Implicit time discretization is performed for the predictor step of PISO while in the corrector steps the equations are discretized explicitly. The numerical model is validated for flow in a constant area, axisymmetric tube with helium gas obeying ideal gas law. The solver's accuracy is assessed by investigating the shape of the Gaussian weight and the number of the nodes in the local subdomains. The calculated velocity and pressure fields are compared with Finite Volume Method (FVM) results, obtained by OpenFOAM software. A good agreement has been achieved.
    Source: Proceedings of CHT-21 ICHMT International Symposium on Advances in Computational Heat Transfer 2021 [Elektronski vir] : 15 - 19, August, Rio de Janeiro, Brazil (Str. 411-423)
    Type of material - conference contribution
    Publish date - 2021
    Language - english
    COBISS.SI-ID - 82391555

    Link(s):

    https://www.dl.begellhouse.com/references/1bb331655c289a0a,30c8200e4cbf0519,101630d81b320e73.html

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