Mol solution for transient turbulent flow in a heated pipe

A non-iterative pressure based scheme for the computation of reacting radiating flows

“…(29), respectively. This approach was successfully applied to the MOL solution of diverse range of fluid flow problems [3,4,20].…”

“…The code uses MOL, which is an efficient semi-discrete approach for the solution of time-dependent partial differential equations (PDEs), in conjunction with (i) a higher-order spatial discretization scheme which chooses biased-upwind or biased-downwind schemes in a zone of dependence manner; (ii) a parabolic algorithm for the computation of axial pressure gradient which does not require the solution of an elliptic equation for pressure; (iii) an elliptic grid generator using body-fitted coordinate system for application to complex geometries. The validity and the predictive ability of the code were tested by applying it to the simulation of laminar/turbulent, isothermal/non-isothermal incompressible flows and comparing its predictions with either [3,4]. In successive studies by the same group [5,6], the code was further developed by incorporation of; the solution of species equations using finite rate chemistry model together with a Total Variation Diminishing (TVD) flux limiter based discretization scheme for the computation of convective derivatives [5]; a radiation submodel to account for radiative heat transfer [6], for the simulation of transient reacting radiating flows.…”

Transient simulation of reacting radiating flows

“…In the present study, parallel implementation was carried out using domain decomposition technique by means of overlapping boundaries at the intergrid regions together with the PVM message passing software due to their proven feasibilities in CFD codes [10,11,23]. The algorithm is based on the masterslave paradigm, where the master process generates the grid structure, sets the initial and physical boundary conditions, decomposes the domain into sub-domains having the same number of grid points, sets the type of each sub-domain (type) and sends the related information to the slave processes.…”

“…The code uses the MOL approach in conjunction with (i) higher-order spatial discretization scheme which chooses biased-upwind and biased-downwind discretization in a zone of dependence manner, (ii) a parabolic algorithm which removes the necessity of iterative solution for pressure (iii) an elliptic grid generator using body-fitted curvilinear coordinate system for application to complex geometries. The validity and the predictive ability of the code was tested by applying it to the simulation of laminar/turbulent, isothermal/non-isothermal incompressible flows and comparing its predictions with either measured data or numerical simulations available in the literature [9,10]. In a latter study by the same group [11], finite rate chemistry was incorporated to the above-mentioned code in order to simulate 2D transient laminar non-radiating reacting flows as an initial step towards the direct simulation of turbulent reacting radiating flows.…”