%0 Conference Paper %1 berger2019numerical %A Berger, Peter %B Lasers in Manufacturing Conference (LiM) %C München %D 2019 %I Wissenschaftliche Gesellschaft Lasertechnik e.V. %K sent ubs_10007 ubs_20011 ubs_30111 ubs_40311 unibibliografie %T Numerical investigations of the temperature distribution around the capillary and its effect on the stability of the capillary rear wall %X For some years now, three-dimensional numerical investigations have been used to gain insights into many phenomena of laser beam welding. However, two-dimensional investigations may be better suited to clarify basic interaction phenomena. The problem to be particularly emphasized here is welding at high speed and with relatively large capillaries. The influence of different parameters on the shape of the weld pool is shown, including the influence of different material properties at different Péclet numbers. Different flow conditions around and behind the capillary are also considered. As a result, it was found that at high Péclet numbers zones with high temperatures and low temperature gradients occur behind the capillary. These can destabilize the capillary back wall, which could explain the transition from a circular to an elongated capillary with increased welding speed.

@inproceedings{berger2019numerical, abstract = {For some years now, three-dimensional numerical investigations have been used to gain insights into many phenomena of laser beam welding. However, two-dimensional investigations may be better suited to clarify basic interaction phenomena. The problem to be particularly emphasized here is welding at high speed and with relatively large capillaries. The influence of different parameters on the shape of the weld pool is shown, including the influence of different material properties at different Péclet numbers. Different flow conditions around and behind the capillary are also considered. As a result, it was found that at high Péclet numbers zones with high temperatures and low temperature gradients occur behind the capillary. These can destabilize the capillary back wall, which could explain the transition from a circular to an elongated capillary with increased welding speed.}, added-at = {2019-11-29T15:31:24.000+0100}, address = {München}, author = {Berger, Peter}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/27e6a394d728294a1ea5cc4bb2e2f60fd/unibiblio}, booktitle = {Lasers in Manufacturing Conference (LiM)}, eventdate = {2019-06-24/2019-06-27}, eventtitle = {Lasers in Manufacturing Conference (LiM)}, interhash = {b654141510d8ad2a37f6120f08cc3c87}, intrahash = {7e6a394d728294a1ea5cc4bb2e2f60fd}, keywords = {sent ubs_10007 ubs_20011 ubs_30111 ubs_40311 unibibliografie}, language = {eng}, publisher = {Wissenschaftliche Gesellschaft Lasertechnik e.V.}, timestamp = {2021-03-04T09:36:36.000+0100}, title = {Numerical investigations of the temperature distribution around the capillary and its effect on the stability of the capillary rear wall}, venue = {München}, year = 2019 }