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A method for hybrid computational fluid dynamics (CFD) approach for modeling a bounded domain, such as a data center, is disclosed. The CFD modeling approach divides the bounded domain into one or more viscous regions and one or more inviscid regions, and then performs a viscous domain solve for the

A method for hybrid computational fluid dynamics (CFD) approach for modeling a bounded domain, such as a data center, is disclosed. The CFD modeling approach divides the bounded domain into one or more viscous regions and one or more inviscid regions, and then performs a viscous domain solve for the viscous region(s) using a computational fluid dynamics model with turbulence equations (i.e., a turbulence model), and performs inviscid domain solve for the inviscid region(s) using a set of inviscid equations (or potential flow equations). After solving for the different regions, results of the viscous domain solve and the inviscid domain solve are provided as a model of the bounded domain.

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1. A method comprising: performing computational fluid dynamics modeling of a bounded domain, the bounded domain comprising a data center, the performing comprising: processing the bounded domain to automatically locate and separate within the bounded domain at least one viscous region and at least

1. A method comprising: performing computational fluid dynamics modeling of a bounded domain, the bounded domain comprising a data center, the performing comprising: processing the bounded domain to automatically locate and separate within the bounded domain at least one viscous region and at least one inviscid region of the bounded domain using a turbulence characteristic threshold criterion to divide the bounded domain into the at least one viscous region and the at least one inviscid region;separately evaluating the at least one viscous region and the at least one inviscid region by: performing viscous domain solve for the at least one viscous region within the bounded domain using at least one turbulence model;performing inviscid domain solve for the at least one inviscid region within the bounded domain using a set of inviscid equations; andproviding results of the viscous domain solve and the inviscid domain solve as an internal model of the bounded domain. 2. The method of claim 1, wherein the processing comprises separating the bounded domain into the at least one viscous region and the at least one inviscid region using at least one grid of the bounded domain, the at least one grid comprising a plurality of cells, and for each cell of multiple cells of the at last one grid, the locating comprises determining whether a set threshold for a turbulence characteristic of that cell has been met, and responsive to the set threshold having been met, assigning the cell to the at least one viscous region, otherwise assigning the cell to the at least one inviscid region. 3. The method of claim 2, wherein the turbulence characteristic comprises at least one of a vorticity magnitude characteristic for the cell, a turbulent viscosity characteristic for the cell, a turbulent kinetic energy characteristic for the cell, or a turbulent dissipation characteristic for the cell. 4. The method of claim 1, wherein the performing viscous domain solve comprises performing multiple iterations of viscous domain solve, and the performing inviscid domain solve comprises performing multiple iterations of inviscid domain solve, and wherein the method further comprises, after each iteration of the multiple iterations of the viscous domain solve, and each iteration of the multiple iterations of the inviscid domain solve, determining whether to update boundary conditions between the at least one viscous region and the at least one inviscid region. 5. The method of claim 1, wherein the processing further comprises identifying at least one interface region within the bounded domain between the at least one viscous region and the at least one inviscid region. 6. The method of claim 5, wherein performing the viscous domain solve comprises performing multiple iterations of viscous domain solve for the at least one viscous region and the at least one interface region using the at least one turbulence model, and wherein performing the inviscid domain solve comprises performing multiple iterations of inviscid domain solve for the at least one inviscid region and the at least one interface region using the set of inviscid equations. 7. The method of claim 6, wherein the viscous domain solve and the inviscid domain solve are subject to different boundary conditions, the boundary conditions for the viscous domain solve comprising boundary conditions at a boundary of the at least one inviscid region and at least one interface region, and the boundary conditions for the inviscid domain solve comprising boundary conditions at a boundary of the at least one interface region and the at least one viscous region. 8. The method of claim 6, wherein performing the viscous domain solve using at least one turbulence model comprises performing the viscous domain solve for the at least one viscous region using full Navier-Stokes equations with at least one turbulence equation and using a multi-grid analysis. 9. The method of claim 8, further comprising setting boundary conditions along the at least one interface region for the inviscid domain solve using results from the viscous domain solve. 10. The method of claim 9, wherein, performing the inviscid domain solve further comprise initializing, where a time step through the computational fluid dynamics modeling is other than zero, a solution for the inviscid domain solve using results from a previous time step (n−1) through the inviscid domain solve. 11. The method of claim 9, wherein performing the inviscid domain solve for the at least one inviscid region comprises performing the inviscid domain solve for the at least one inviscid region using the set of inviscid equations and using a multi-grid analysis. 12. The method of claim 11, farther comprising incrementing as time step (n) iteration through the computational fluid dynamics modeling, and setting for time step (n) boundary conditions along the at least one interface region for the viscous domain solve using results from the inviscid domain solve at time step (n−1). 13. The method of claim 12, wherein performing the viscous domain solve further comprises initializing, where the time step (n) through the computational fluid dynamics modeling is other than zero, a solution for the viscous domain solve using results from a previous time step (n−1) through the viscous domain solve. 14. The method of claim 12, further comprising repeating performing the viscous domain solve, the setting boundary conditions along the at least one interface region for the inviscid domain solve, the performing the inviscid domain solve, the incrementing the time step (n), and the setting boundary conditions along the at least one interface region for the viscous domain solve, until the time step (n) reaches a set convergence threshold time step (n) for the computational fluid dynamics modeling of the bounded domain. 15. The method of claim 1, further comprising, prior to the processing, building a solution domain as an initial computational fluid dynamics model of the bounded domain, defining boundary conditions for the solution domain, creating at least one coarse grid of the solution domain, and first solving the solution domain using the at least one coarse grid and the set of inviscid equations. 16. The method of claim 15, further comprising, prior to the processing, reusing the solution domain from the first solving, the boundary conditions for the solution domain, and the at least one coarse grid, and second solving the solution domain using the at least one coarse grid, and using the at least one turbulence model to ascertain a turbulence characteristic for each cell of a plurality of cells of the at least one coarse grid. 17. The method of claim 16, wherein the first solving the initial computational fluid dynamics model using the at least one coarse grid and the set of inviscid equations comprises initializing a first solution for the solution domain, and the second solving of the initial computational fluid dynamics model using the at least one coarse grid and the turbulence model comprises initialing a second solution for the solution domain with results from the first solving. 18. The method of claim 1, further comprising repeating performing the viscous domain solve and performing the inviscid domain solve for multiple iterations, and wherein the method further comprises, during the repeating, relocating the bounded domain into a different at least one viscous region and a different at least one inviscid region and, subsequent to the re-dividing, performing the viscous domain solve for the different at least one viscous region using the turbulence model and performing the inviscid domain solve for the different at least one inviscid region using the set of inviscid equations. 19. The method of claim 1, wherein performing the viscous domain solve uses at least one first grid and the performing the inviscid domain solve uses at least one second grid, and wherein the method further comprises repeating the performing the viscous domain solve and the performing the inviscid domain solve, and during the repeating, dynamically adapting the at least one first grid for the viscous domain solve or the at least one second grid for the inviscid domain solve. 20. The method of claim 1, wherein performing the viscous domain solve uses at least one fine grid and performing the inviscid domain solve uses at least one medium grid, the at least one medium grid being coarser than the at least one fine grid.