Capuano, Francesco
(2015)
Development of high-fidelity numerical methods for turbulent flows simulation.
[Tesi di dottorato]
Tipologia del documento: |
Tesi di dottorato
|
Lingua: |
English |
Titolo: |
Development of high-fidelity numerical methods for turbulent flows simulation |
Autori: |
Autore | Email |
---|
Capuano, Francesco | f.capuano@cira.it |
|
Data: |
31 Marzo 2015 |
Numero di pagine: |
96 |
Istituzione: |
Università degli Studi di Napoli Federico II |
Dipartimento: |
Ingegneria Industriale |
Scuola di dottorato: |
Ingegneria industriale |
Dottorato: |
Ingegneria aerospaziale, navale e della qualità |
Ciclo di dottorato: |
27 |
Coordinatore del Corso di dottorato: |
nome | email |
---|
de Luca, Luigi | deluca@unina.it |
|
Tutor: |
nome | email |
---|
de Luca, Luigi | [non definito] | Coppola, Gennaro | [non definito] | Schettino, Antonio | [non definito] | Borrelli, Salvatore | [non definito] |
|
Data: |
31 Marzo 2015 |
Numero di pagine: |
96 |
Parole chiave: |
turbulent flows; large-eddy simulation; direct numerical simulation; energy-preserving schemes; Runge-Kutta methods |
Settori scientifico-disciplinari del MIUR: |
Area 09 - Ingegneria industriale e dell'informazione > ING-IND/06 - Fluidodinamica |
[error in script]
[error in script]
Depositato il: |
07 Apr 2015 14:17 |
Ultima modifica: |
12 Ott 2015 07:41 |
URI: |
http://www.fedoa.unina.it/id/eprint/10447 |
DOI: |
10.6092/UNINA/FEDOA/10447 |
Abstract
Energy-conserving discretizations are widely regarded as a fundamental requirement for high-fidelity simulations of turbulent flows. A well-known approach to obtain semi-discrete conservation of energy in the inviscid limit is to employ the skew-symmetric splitting of the non-linear term. However, this approach has the drawback of being roughly twice as expensive as the computation of the divergence or advective forms alone. A novel time-advancement strategy that retains the conservation properties of skew-symmetric-based schemes at a reduced computational cost has been developed. This method is based on properly constructed Runge-Kutta schemes in which a different form (advective or divergence) for the convective term is adopted at each stage. A general theoretical framework has been developed to derive new schemes with prescribed accuracy on both solution and energy conservation. The technique has been first developed and fine-tuned on the Burgers' equation, and then
applied to the incompressible Navier-Stokes equations. Simulations of homogeneous isotropic turbulence performed at the Center for Turbulence Research (CTR) in Stanford have demonstrated that the novel procedure provides the same robustness of the skew-symmetric form while halving the computational cost for the non-linear term.
Downloads per month over past year
Actions (login required)
|
Modifica documento |