In this paper, a new shock-fitting technique based on unstructured dynamic grids is proposed to improve the performances of the unstructured “boundary” shock-fitting technique developed by Liu and co-workers in [1, 2]. The main feature of this new technique, which we call the “embedded” shock-fitting technique, is its capability to insert or remove shocks or parts thereof during the calculation. This capability is enabled by defining subsets of grid-points (mutually connected by lines) which behave as either “common”- or “shock”-points, shock-waves being made of an ordered collection of shock-points. Two different sets of flow variables, corresponding to the upstream and downstream sides of the shocks, are assigned to the shock-points, which may be switched to common- and back to shock-points, a feature that allows to vary the length of the existing shocks and/or make new shock-branches appear. This paper illustrates the algorithmic features of this new technique and presents the results obtained when simulating both steady and un-steady, two-dimensional flows.

An embedded shock-fitting technique on unstructured dynamic grids / Zou, D.; Bonfiglioli, A.; Paciorri, R.; Liu, J.. - In: COMPUTERS & FLUIDS. - ISSN 0045-7930. - 218:(2021). [10.1016/j.compfluid.2021.104847]

An embedded shock-fitting technique on unstructured dynamic grids

Paciorri R.
Penultimo
Conceptualization
;
2021

Abstract

In this paper, a new shock-fitting technique based on unstructured dynamic grids is proposed to improve the performances of the unstructured “boundary” shock-fitting technique developed by Liu and co-workers in [1, 2]. The main feature of this new technique, which we call the “embedded” shock-fitting technique, is its capability to insert or remove shocks or parts thereof during the calculation. This capability is enabled by defining subsets of grid-points (mutually connected by lines) which behave as either “common”- or “shock”-points, shock-waves being made of an ordered collection of shock-points. Two different sets of flow variables, corresponding to the upstream and downstream sides of the shocks, are assigned to the shock-points, which may be switched to common- and back to shock-points, a feature that allows to vary the length of the existing shocks and/or make new shock-branches appear. This paper illustrates the algorithmic features of this new technique and presents the results obtained when simulating both steady and un-steady, two-dimensional flows.
2021
numerical simulation; shock wave; shock-fitting; unstructured dynamic grid
01 Pubblicazione su rivista::01a Articolo in rivista
An embedded shock-fitting technique on unstructured dynamic grids / Zou, D.; Bonfiglioli, A.; Paciorri, R.; Liu, J.. - In: COMPUTERS & FLUIDS. - ISSN 0045-7930. - 218:(2021). [10.1016/j.compfluid.2021.104847]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1493413
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