The ortho-semi-torsional (OST) spring analogy method for 3D mesh moving boundary problems

Markou, GA; Mouroutis, ZS; Charmpis, DC; Papadrakakis, M

dc.contributor.author	Markou, GA	en
dc.contributor.author	Mouroutis, ZS	en
dc.contributor.author	Charmpis, DC	en
dc.contributor.author	Papadrakakis, M	en
dc.date.accessioned	2014-03-01T01:27:26Z
dc.date.available	2014-03-01T01:27:26Z
dc.date.issued	2007	en
dc.identifier.issn	0045-7825	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18448
dc.subject	Coupled problems	en
dc.subject	Mesh update	en
dc.subject	Preconditioned conjugate gradient	en
dc.subject	Solution algorithms	en
dc.subject.classification	Engineering, Multidisciplinary	en
dc.subject.classification	Mathematics, Interdisciplinary Applications	en
dc.subject.classification	Mechanics	en
dc.subject.other	Algorithms	en
dc.subject.other	Boundary value problems	en
dc.subject.other	Computer simulation	en
dc.subject.other	Elasticity	en
dc.subject.other	Gradient methods	en
dc.subject.other	Torsional stress	en
dc.subject.other	Mesh moving boundary problems	en
dc.subject.other	Ortho-semi-torsional (OST)	en
dc.subject.other	Preconditioned conjugate gradient	en
dc.subject.other	Solution algorithms	en
dc.subject.other	Spring analogy	en
dc.subject.other	Springs (components)	en
dc.subject.other	Algorithms	en
dc.subject.other	Boundary value problems	en
dc.subject.other	Computer simulation	en
dc.subject.other	Elasticity	en
dc.subject.other	Gradient methods	en
dc.subject.other	Springs (components)	en
dc.subject.other	Torsional stress	en
dc.title	The ortho-semi-torsional (OST) spring analogy method for 3D mesh moving boundary problems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.cma.2006.04.009	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.cma.2006.04.009	en
heal.language	English	en
heal.publicationDate	2007	en
heal.abstract	In this paper a new mesh update technique is presented for the effective treatment of 3D mesh moving boundary problems. The proposed mesh update scheme utilizes an ortho-semi-torsional (OST) spring analogy concept to construct a fictitious elasticity problem with imposed boundary displacements, which is efficiently solved with an algorithm based on the preconditioned conjugate gradient (PCG) method. The PCG-based solution algorithm is also applied to three other mesh update techniques available in the literature, namely the torsional, the semi-torsional and the ball-vertex spring analogy schemes. The four spring analogy methods are comparatively assessed with respect to their robustness and computational efficiency in handling 3D benchmark problems, as well as more involved test cases such as the AGARD wing 445.6 and a 3D three-element airfoil. It is demonstrated that the OST spring analogy concept combined with a PCG-type algorithm for the solution of fictitious elasticity problems provides robustness for substantially distorted meshes and computational efficiency for large-scale problems. (c) 2006 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Computer Methods in Applied Mechanics and Engineering	en
dc.identifier.doi	10.1016/j.cma.2006.04.009	en
dc.identifier.isi	ISI:000242648300003	en
dc.identifier.volume	196	en
dc.identifier.issue	4-6	en
dc.identifier.spage	747	en
dc.identifier.epage	765	en