BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Beyond DNS resolution: Resolving transport phenomena in laminar je
 t impingement
DTSTART:20180216T091500
DTEND:20180216T101500
DTSTAMP:20260410T135102Z
UID:eb09e5b5623dd7e67816fc09dbc1d91c6024c1b05ed32185b597c384
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr.-Ing. Dr. rer. pol. Wilko Rohlfs\,  RWTH Aachen University\
 nAbstract :\nImpinging jets are central to many industrial processes and a
 pplications\, and as such have been investigated extensively in the past c
 entury. Today’s research focusses on turbulent jet impingement mainly\, 
 including direct numerical simulations of jet impingement (with Reynolds n
 umbers of around 10\,000). However\, the miniaturization of electrical com
 ponents and its increase in power density (up to 200W/cm²)\, especially i
 n the electro-mobility sector\, calls for localized cooling techniques. Di
 ssipating heat from small hot-spots of a few millimeter size leads back to
  laminar flow conditions.\nThis research seminar demonstrates that a preci
 se analysis and evaluation of laminar jet impingement can still yield new 
 insights into the governing physical mechanisms. The seminar will be struc
 tured in two sections. First\, the influence of local flow acceleration in
  the stagnation zone will be discussed\; explaining the root cause for an 
 increasing Nusselt number in flow direction within the stagnation zone. Th
 e second section demonstrates how new physically-based correlations for th
 e Nusselt number in the stagnation zone can be obtained from a precise pos
 t-processing of numerical simulation results. The seminar ends with an out
 look for further studies that grounds on the knowledge obtained before.\n\
 nBio :\nDr. Rohlfs is a researcher and research group leader in the field 
 of heat and mass transfer and fluid dynamics at RWTH Aachen University. He
  received his PhD in mechanical engineering for his work on inverted and e
 lectrified falling liquid films in 2015. Further research foci of Dr. Rohl
 fs are the fundamentals of jet impingement as used for cooling of small-si
 ze electric devices (power electronics or microchips). In his research gro
 up\, he applies experimental\, numerical and theoretical methods. In 2014 
 he received a second PhD in economics for his work on modelling investment
  decisions under uncertainty in the electricity sector.
LOCATION:MED 0 1418 https://plan.epfl.ch/?room==MED%200%201418
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR