This iterative process is painstakingly slow, costly, and does not lend itself to identifying the optimal engine design specifications. Fortran software Physics software Industrial software Computational fluid dynamics Finite element software for Linux. Department of Energy Software”. KIVA, a transient, three-dimensional , multiphase , multicomponent code for the analysis of chemically reacting flows with sprays has been under development at LANL for decades. A ” kiva ” is actually a round Pueblo ceremonial chamber that is set underground and entered from above by means of a ladder through its roof; drawing on LANL’s southwestern heritage, an analogy is made with the typical engine cylinder in which the entrance and exit of gases is achieved through valves set in the cylinder. However, the numerical accuracy diminishes when the grid is not composed of hexahedra.
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Retrieved October 24, Poorly controlled and incomplete combustion can cause higher levels of emissions and lower engine efficiencies. In order to optimize combustion processes, engine designers have traditionally undertaken manual kivx modifications, conducted testing, and analyzed the results.
Automatic restart of the cycle with a reduced timestep in case of iteration limit or temperature overflow effectively reduced code crashes.
Los Alamos National Laboratory. This page was last edited on 8 Novemberat The software predicts complex fuel and air flows as well as ignitioncombustionand pollutant-formation processes in engines.
Department of Kova Software”. A new subroutine monitors the liquid and gaseous fuel phases and kiva 3v balance data and emissions are monitored and printed. Archived from the original on A ” kiva ” is actually a round Pueblo ceremonial chamber that is set underground and entered from above by means of a ladder through its roof; drawing kiva 3v LANL’s southwestern kiva 3v, an analogy is made with the typical engine cylinder in which the entrance and exit of gases is achieved through valves set in the cylinder.
General Motors has used KIVA in the development of direct-injection, stratified charge gasoline engines as well as the fast burn, homogeneous-charge gasoline engine. The kiva 3v uses an Arbitrary Lagrangian Eulerian ALE methodology on a staggered gridand discretizes space using the finite volume method.
KIVA: Engine Research Center ~ UW-Madison
Archived copy as title Webarchive template wayback links All articles with unsourced kiva 3v Articles with unsourced statements from August However, the numerical kiva 3v diminishes when the grid is not composed of hexahedra. KIVA-4mpi also solves chemically reacting, turbulent, multi-phase viscous flows, but does this on multiple computer 3f with a distributed computational domain grid.
KIVA, a transient, three-dimensionalmultiphasemulticomponent code for the analysis of chemically reacting flows with sprays has been under development at LANL for decades.
Retrieved from ” https: The software is well suited for modeling internal combustion engines on multiple processors using the message passing interface MPI. New features enhanced the robustness, efficiency, and usefulness of the overall program for engine modeling. When the nation found itself in the midst of the first energy crisis in the s, this core Laboratory capability transformed into ,iva, an internal combustion engine modeling tool designed klva help make automotive kifa more fuel-efficient and cleaner-burning.
KIVA-3V uses a block-structured mesh with connectivity defined through indirect addressing. LinuxUnixWindows.
The code uses an implicit time-advancement with the exception of the advective terms that are cast in an kkva but second-order monotonicity -preserving manner. Also, the jiva calculations can be subcycled in the desired regions to avoid restricting the time step due to Courant conditions. The versatility and range of features have made KIVA programs attractive kiva 3v a variety of non-engine applications as kiva 3v these range from convection towers to modeling silicon dioxide condensation in high pressure oxidation chambers.
KIVA-4 also features a multicomponent fuel evaporation algorithm. The KIVA models have been used to understand combustion chemistry processes, such as auto-ignition of fuels, and to optimize diesel engines for high efficiency and low emissions.
Extensions to the particle-based liquid wall film model made the model more complete and a split injection option was also added. Transport and chemical reactions for an arbitrary number of species and their kova reactions is provided. Other applications have included the analysis of flows in automotive catalytic converterspower plant smokestack cleaning, pyrolytic treatment of biomassdesign of fire suppression systemsPulsed Detonation Engines Kovastationary burners, aerosol dispersion, and design of heating, ventilation, and air conditioning systems.
The unstructured grids may be composed of a variety of elements including hexahedraprismspyramidsand tetrahedra. Fortran software Physics software Industrial software Computational fluid dynamics Kiva 3v element software for Linux. Although specifically designed for simulating internal combustion enginesthe kiva 3v of the code facilitates easy modifications for solving a variety of hydrodynamics problems involving chemical reactions. Fuel economy is heavily dependent upon engine efficiencywhich in turn depends to a large degree on how fuel is burned within the cylinders of the engine.