Thermohydrodynamic (THD) lubrication with stochastic roughness: derivation of novel reynolds-type equations and comparison with Monte Carlo simulation

Φίλιππας, Ιωάννης; Filippas, Ioannis

dc.contributor.author	Φίλιππας, Ιωάννης	el
dc.contributor.author	Filippas, Ioannis	en
dc.date.accessioned	2025-03-05T09:04:19Z
dc.date.available	2025-03-05T09:04:19Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/61199
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.28895
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/gr/	*
dc.subject	Thermohydrodynamic lubrication	en
dc.subject	Stochastic Roughness	en
dc.subject	Monte Carlo	en
dc.subject	Θερμοϋδροδυναμική λίπανση	el
dc.subject	Εξίσωση Reynolds	el
dc.subject	Στοχαστική τραχύτητα	el
dc.subject	Έδρανα ολίσθησης	el
dc.subject	Reynolds equation	en
dc.subject	Slider bearings	en
dc.subject	Υδροδυναμική λίπανση	el
dc.title	Thermohydrodynamic (THD) lubrication with stochastic roughness: derivation of novel reynolds-type equations and comparison with Monte Carlo simulation	en
dc.title	Θερμοϋδροδυναμική λίπανση με στοχαστική τραχύτητα: Εξαγωγή νέων εξισώσεων τύπου Reynolds και σύγκριση με μέθοδο Monte Carlo	el
heal.type	bachelorThesis
heal.classification	Thermohydrodynamic lubrication	en
heal.classification	Mathematics	en
heal.classification	Stochastic Roughness	en
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2024-10-09
heal.abstract	Lubrication plays a crucial role in engineering, significantly impacting the performance and longevity of mechanical systems. Understanding the interplay between lubrication, thermohydrodynamic effects, and surface roughness is crucial for designing efficient, long-lasting mechanical systems across various industries. However, given the complexity of the problem, this direction, to date, remains insufficiently studied. In this thesis, the problem of Thermohydrodynamic lubrication combined with surface roughness of the bearing surfaces is investigated. Three novel Reynolds – type equations, for the pressure field, are analytically derived for the case of the infinitely long slider bearing. Furthermore, a Monte Carlo method is developed and the results obtained from the Monte Carlo method are used to evaluate the analytically derived equations, since the relevant data in the literature are scarce for this problem. To implement the Monte Carlo method as well as to solve the derived equations, a numerical scheme is developed. The Reynolds equations are solved with the method of successive over relaxation (SOR), and the Energy equation is solved using the Crank – Nicolson method. The proposed analytical equations are validated against the results of the Monte Carlo method, with one equation giving results in good agreement with the Monte Carlo method	en
heal.advisorName	Παπαδόπουλος, Χρήστος	el
heal.advisorName	Papadopoulos, Christos	en
heal.committeeMemberName	Παπαδόπουλος, Χρήστος	el
heal.committeeMemberName	Παπαδάκης, Γεώργιος	el
heal.committeeMemberName	Ζερβάκη, Άννα	el
heal.committeeMemberName	Christos, Papadopoulos	en
heal.committeeMemberName	Papadakis, George	en
heal.committeeMemberName	Zervaki, Anna	en
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Ναυτικής Μηχανολογίας. Εργαστήριο Ναυτικής Μηχανολογίας	el
heal.academicPublisherID	ntua
heal.numberOfPages	152 σ.	el
heal.fullTextAvailability	false