eprintid: 20092
rev_number: 12
eprint_status: archive
userid: 2277
dir: disk0/00/02/00/92
datestamp: 2016-02-01 09:38:20
lastmod: 2016-03-01 11:42:03
status_changed: 2016-02-01 09:38:20
type: doctoralThesis
metadata_visibility: show
creators_name: Beck, Teresa
title: In-Time Parallelization Of Atmospheric Chemical Kinetics
subjects: ddc-500
divisions: i-110400
adv_faculty: af-11
keywords: Parareal
cterms_swd: Atmosphärische Chemie
cterms_swd: Meteorologie
abstract: This work investigates the potential of an in-time parallelization of atmospheric chemical ki-
netics. Its numerical calculation is one time-consuming step within the numerical prediction
of the air quality. The widely used parallelization strategies only allow a limited potential
level of parallelism. A higher level of parallelism within the codes will be necessary to enable
benefits from future exa-scale computing architectures. In air quality prediction codes, chem-
ical kinetics is typically considered to react in isolated boxes over short splitting intervals.
This allows their trivial parallelization in space, which however is limited by the number of
grid entities. This work pursues a parallelization beyond this trivial potential and investigates
a parallelization across time using the so called “parareal algorithm”. The latter is an iterative
prediction-correction scheme, whose efficiency strongly depends on the choice of the predictor. For that purpose, different options are being investigate and compared: Time-stepping schemes with fixed step size, adaptive time-stepping schemes and repro-models, functional representations, that map a given state to a later state in time. Only the choice of repromodels leads to a speed-up through parallelism, compared to the sequential reference for the scenarios considered here.
date: 2016
id_scheme: DOI
id_number: 10.11588/heidok.00020092
ppn_swb: 165531551X
own_urn: urn:nbn:de:bsz:16-heidok-200922
date_accepted: 2015-12-21
advisor: HASH(0x55a9a64944f0)
language: eng
bibsort: BECKTERESAINTIMEPARA2016
full_text_status: public
citation:   Beck, Teresa  (2016) In-Time Parallelization Of Atmospheric Chemical Kinetics.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/20092/1/TBeck_Phd_a.pdf