dc.contributor.author |
Κότσιρας, Ηλίας
|
el |
dc.contributor.author |
Kotsiras, Ilias
|
en |
dc.date.accessioned |
2019-06-27T08:42:39Z |
|
dc.date.available |
2019-06-27T08:42:39Z |
|
dc.date.issued |
2019-06-27 |
|
dc.identifier.uri |
https://dspace.lib.ntua.gr/xmlui/handle/123456789/48915 |
|
dc.identifier.uri |
http://dx.doi.org/10.26240/heal.ntua.16666 |
|
dc.rights |
Default License |
|
dc.subject |
Ελάχιστη ποσότητα ψυκτικού υγρού |
el |
dc.subject |
Νανορευστά |
el |
dc.subject |
Υγρά κοπής |
el |
dc.subject |
Λείανση |
el |
dc.subject |
MQL |
el |
dc.subject |
Grinding |
el |
dc.subject |
Nanofluids |
el |
dc.subject |
Nanoparticles |
el |
dc.subject |
Cutting fluids |
el |
dc.subject |
Νανοσωματιδια |
el |
dc.title |
Υπολογιστική μελέτη της χρήσης νανορευστών ως υγρών κοπής υπό συνθήκες ελάχιστης ποσότητας ψυχτικού υγρού κατά τη λείανση |
el |
heal.type |
bachelorThesis |
|
heal.classification |
Κατεργασίες υλικών |
el |
heal.classificationURI |
http://data.seab.gr/concepts/12ca5151411399c77d21d70b67b67a46b688b242 |
|
heal.language |
el |
|
heal.access |
free |
|
heal.recordProvider |
ntua |
el |
heal.publicationDate |
2019-03-07 |
|
heal.abstract |
Η παρούσα διπλωματική εργασία εκπονήθηκε στα πλαίσια των σπουδών μου στη σχολή Μηχανολόγων Μηχανικών του Εθνικού Μετσόβιου Πολυτεχνείου. Το γενικότερο θέμα που ασχολείται η παρούσα εργασία είναι η χρήση των νανορευστών ως υγρών κοπής με σκοπό την βελτίωση των συνθηκών της κατεργασίας της λείανσης ώστε να επιτευχθεί η καλύτερη δυνατή ποιότητα κατεργασίας αλλά και όσο το δυνατόν γίνεται πιο φιλική κατεργασία προς το περιβάλλον. |
el |
heal.abstract |
In this diploma thesis, a finite element model was developed for cases of Minimum Quantity Lubrication grinding with nanofluids. The aim of the thesis is to make the model as realistic as possible under various conditions. For the simulations, Comsol Multiphysics computational package was used. Initially, the geometry of the two-dimensional model consisting of the region of cooling fluid and the region of the workpiece was constructed, based on an experimental setup described in the literature. The heat flux source was defined at the interface of the two regions. After completing the modeling process, the model was simulated for different conditions. The simulation was performed in the time domain for constant feed speed. Then, an investigation was conducted regarding different types of meshes to clarify which one best meets the simulation demands. Different simulation parameters were then examined, such as the fluid inlet velocity and the thickness of top region. After studying the simulation parameters, the most accurate one was chosen to simulate the other 5 types of nanofluids. The thermal stresses developed from the use of all 6 nanofluids were calculated and the use of a different type of heat source was tested. The results of the above simulation were compared directly with the results of experimental studies in the relevant literature to judge the validity of the model. The results were considered quite satisfactory compared to the experimental results in the literature. |
en |
heal.advisorName |
Μαρκόπουλος, Άγγελος |
el |
heal.committeeMemberName |
Μαρκόπουλος, Άγγελος |
el |
heal.committeeMemberName |
Βοσνιάκος, Γεώργιος - Χριστόφορος |
el |
heal.committeeMemberName |
Μανωλάκος, Δημήτριος |
el |
heal.academicPublisher |
Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Μηχανολόγων Μηχανικών. Τομέας Τεχνολογίας των Κατεργασιών |
el |
heal.academicPublisherID |
ntua |
|
heal.numberOfPages |
90 σ. |
el |
heal.fullTextAvailability |
true |
|