6533b825fe1ef96bd1281db2
RESEARCH PRODUCT
Large-Eddy Simulation of Flow and Heat Transfer in Compact Heat Exchangers
G. LombardoMichele CiofaloM. W. Collinssubject
Plate heat exchangerMechanicsComputational Fluid DynamicSIMPLEC algorithmLarge Eddy SimulationPhysics::Fluid DynamicsNTU methodMoving bed heat exchangerHeat transferCompact Heat ExchangerMicro heat exchangerPlate fin heat exchangerSettore ING-IND/07 - Propulsione AerospazialeSettore ING-IND/19 - Impianti NucleariLarge eddy simulationdescription
LES results are presented for different heat exchanger geometries. Subgrid terms were usually computed by the Smagorinsky model; preliminary comparative results are also given for the ‘dynamic’ subgrid model. The numerical methods used were those implemented in a commercial general-purpose code (CFDS-FLOW3D); they included a finite-volume approach, colocated body-fitted grids, central differencing for the advection terms, the SIMPLEC algorithm, and Crank-Nicolson time stepping. Predictions arc compared with experimental measurements (including local Nu distributions), and with results from a low-Reynolds number k-e model. In most cases, LES was more ‘robust’ and required little more CPU time than the latter, while providing comparable overall results and much more information on the flow physics.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-01-01 |