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  1. Numerical simulation of turbulent unsteady compressible pipe flow with heat transfer in the entrance region
Numerical simulation of turbulent unsteady compressible pipe flow with heat transfer in the entrance region
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Numerical simulation of turbulent unsteady compressible pipe flow with heat transfer in the entrance region

Ziaei Rad, M

Numerical simulation of turbulent unsteady compressible pipe flow with heat transfer in the entrance region

Ziaei Rad, M ; Sharif University of Technology | 2008

1216 Viewed
  1. Type of Document: Article
  2. DOI: 10.1088/0031-8949/2008/T132/014052
  3. Publisher: 2008
  4. Abstract:
  5. In this paper, the compressible gas flow through a pipe subjected to wall heat flux in unsteady condition in the entrance region is investigated numerically. The coupled conservation equations governing turbulent compressible viscous flow in the developing region of a pipe are solved numerically under different thermal boundary conditions. The numerical procedure is a finite-volume-based finite-element method applied to unstructured grids. The convection terms are discretized by the well-defined Roe method, whereas the diffusion terms are discretized by a Galerkin finite-element formulation. The temporal terms are evaluated based on an explicit fourth-order Runge-Kutta scheme. The effect of different thermal conditions on the pressure loss of unsteady flow is investigated. The results show that increase in the inflow temperature or pipe-wall heat flux increases the pressure drop or decreases the mass flow rate in the pipe. © 2008 The Royal Swedish Academy of Sciences
  6. Keywords:
  7. Compressible gas ; Conservation equations ; Developing regions ; Entrance region ; Finite element formulations ; Finite-volume ; Fourth-order ; Galerkin ; Mass flow rate ; Numerical procedures ; Numerical simulation ; Pressure loss ; Roe method ; Runge-Kutta ; Temporal terms ; Thermal boundary conditions ; Thermal condition ; Unsteady conditions ; Unstructured grid ; Wall heat flux ; Aerodynamics ; Computer simulation ; Finite element method ; Fluid dynamics ; Heat flux ; Pipe ; Pipe flow ; Pressure effects ; Runge Kutta methods ; Vehicular tunnels ; Flow simulation
  8. Source: International Conference 'Turbulent Mixing and Beyond', Trieste, 18 August 2007 through 26 August 2007 ; Volume T132 , December , 2008 ; 02811847 (ISSN)
  9. URL: https://iopscience.iop.org/article/10.1088/0031-8949/2008/T132/014052