BEGIN:VCALENDAR VERSION:2.0 PRODID:www.dresden-science-calendar.de METHOD:PUBLISH CALSCALE:GREGORIAN X-MICROSOFT-CALSCALE:GREGORIAN X-WR-TIMEZONE:Europe/Berlin BEGIN:VTIMEZONE TZID:Europe/Berlin X-LIC-LOCATION:Europe/Berlin BEGIN:DAYLIGHT TZNAME:CEST TZOFFSETFROM:+0100 TZOFFSETTO:+0200 DTSTART:19810329T030000 RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=3;BYDAY=-1SU END:DAYLIGHT BEGIN:STANDARD TZNAME:CET TZOFFSETFROM:+0200 TZOFFSETTO:+0100 DTSTART:19961027T030000 RRULE:FREQ=YEARLY;INTERVAL=1;BYMONTH=10;BYDAY=-1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:DSC-22747 DTSTART;TZID=Europe/Berlin:20260423T150000 SEQUENCE:1775280985 TRANSP:OPAQUE DTEND;TZID=Europe/Berlin:20260423T163000 URL:https://dresden-science-calendar.org/calendar/de/detail/22747 LOCATION:TUD Andreas-Pfitzmann-Bau\, Nöthnitzer Straße 4601069 Dresden SUMMARY:Raasch: The PALM Model System Release 25.10 - An LES Code for Basic and Environmental Research – Capabilities and Recent Applications CLASS:PUBLIC DESCRIPTION:Speaker: Prof. Dr. Siegfried Raasch\nInstitute of Speaker: Depa rtment of Meteorology and Climatology\, IMUK\, Leibniz University Hannover \, Germany\; Pecanode GmbH\nTopics:\nBauing.\, Architektur\, Biologie\, Ch emie\, Informatik\, Mathematik\, Physik\, Umwelt\, Verkehr\, Willkommen\n Location:\n Name: TUD Andreas-Pfitzmann-Bau (WIL Willers-Bau Haus A \, Ze llescher Weg 12 - 14\, Raum A317)\n Street: Nöthnitzer Straße 46\n Cit y: 01069 Dresden\n Phone: \n Fax: \nDescription:

Originally applied t o study the convective atmospheric boundary layer (CBL)\, largeeddy
si mulation (LES) is now used in many areas of science. This is mainly due to a
substantial increase in available computing resources. State-of-the -art massively
parallel computers have opened the field to a wide vari ety of new applications. On
these machines\, simulations with extremel y large numerical grids - up to 40003 grid
points and beyond - are cur rently performed within acceptable timeframes. In
Meteorology\, beside s for the fundamental research on neutral and stable stratified
flows\ , where the typical eddy size is much smaller than in purely convectively driven
flows\, LES is increasingly used for more applied topics such a s air-pollution
modeling\, flow around buildings\, wind energy\, and a ircraft operation.

The LES model PALM (PArallelize d LES Model)\, originally developed at t he Leibniz
University Hannover (LUH)\, has become a community model ov er the last 10-15
years. Besides LUH\, a team of national and internat ional developers has significally
extended the original code with a wi de range of features\, including cloud physics\,
chemistry\, radiation \, Lagrangian particles\, and various nesting capabilities. A strong
f ocus is placed on the explicit representation of detailed surface processe s\, e.g.
resolved-scale vegetation and the complex geometry of buildin gs. PALM is well
optimized for state-of-the-art cache-based and vector processors and scales
efficiently up to 40.000 cores and beyond. The code is currently ported to run on
GPUs.

The talk will start wi th a short general introduction to atmospheric turbulence and
LES\, an d then provide an overview of PALM’s features\, illustrated by results f rom
recent studies at IMUK.

Siegfried Raasch was a professor of theoretical meteorology at Leibniz University
Hannover until his reti rement in 2024. He is now an employed by Pecanode GmbH\,
where he cont inues to develop and maintain the PALM model\, which he initially
bega n developing in 1997. His research interests focus on atmospheric boundary
layer turbulence\, large-eddy simulation\, and the optimization of nu merical algorithms.

ONLINE BBB: Link ZIH-Colloquia (https://bbb.tu-dresden.de/b/har-oa6-col-lmy)

DTSTAMP:20260405T073810Z CREATED:20260310T063801Z LAST-MODIFIED:20260404T053625Z END:VEVENT END:VCALENDAR