TY  - JOUR
A1  - Pieper, Martin
A1  - Ivanyshyn, Olha
T1  - Nonlinear integral equations for a 3D inverse acoustic scattering problem : abstract / O. Ivanyshyn and M. Pieper
Y1  - 2008
N1  - World Congress on Computational Mechanics <8, 2008, Venedig> ; European Congress on Computational Methods in Applied Sciences and Engineering <5, 2008, Venedig>
ER  - 
TY  - JOUR
A1  - Pieper, Martin
A1  - Klein, Peter
T1  - A simple and accurate numerical network flow model for bionic micro heat exchangers
JF  - Heat mass transfer
Y1  - 2011
SN  - 0947-7411
VL  - 47
IS  - 5
SP  - 491
EP  - 503
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Pieper, Martin
A1  - Klein, Peter
T1  - Application of simple, periodic homogenization techniques to non-linear heat conduction problems in non-periodic, porous media
JF  - Heat mass transfer
N2  - Often, detailed simulations of heat conduction in complicated, porous media have large runtimes. Then homogenization is a powerful tool to speed up the calculations by preserving accurate solutions at the same time. Unfortunately real structures are generally non-periodic, which requires unpractical, complicated homogenization techniques. We demonstrate in this paper, that the application of simple, periodic techniques to realistic media, that are just close to periodic, gives accurate, approximative solutions. In order to obtain effective parameters for the homogenized heat equation, we have to solve a so called “cell problem”. In contrast to periodic structures it is not trivial to determine a suitable unit cell, which represents a non-periodic media. To overcome this problem, we give a rule of thumb on how to choose a good cell. Finally we demonstrate the efficiency of our method for virtually generated foams as well as real foams and compare these results to periodic structures.
Y1  - 2012
U6  - http://dx.doi.org/10.1007/s00231-011-0879-4
SN  - 0947-7411
VL  - 48
IS  - 2
SP  - 291
EP  - 300
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Pieper, Martin
A1  - Klein, Peter
T1  - Numerical solution of the heat equation with non-linear, time derivative-dependent source term
JF  - International Journal for Numerical Methods in Engineering
N2  - The mathematical modeling of heat conduction with adsorption effects in coated metal structures yields the heat equation with piecewise smooth coefficients and a new kind of source term. This term is special, because it is non-linear and furthermore depends on a time derivative. In our approach we reformulated this as a new problem for the usual heat equation, without source term but with a new non-linear coefficient. We gave an existence and uniqueness proof for the weak solution of the reformulated problem. To obtain a numerical solution, we developed a semi-implicit and a fully implicit finite volume method. We compared these two methods theoretically as well as numerically. Finally, as practical application, we simulated the heat conduction in coated aluminum fibers with adsorption in the zeolite coating. Copyright © 2010 John Wiley & Sons, Ltd.
Y1  - 2010
U6  - http://dx.doi.org/10.1002/nme.2937
SN  - 0029-5981
VL  - 84
IS  - 10
SP  - 1205
EP  - 1221
PB  - Wiley
CY  - Chichester
ER  - 
TY  - JOUR
A1  - Predel, Bruno
A1  - Gerdes, F.
A1  - Gerling, Ulrich
T1  - Berücksichtigung der Assoziation in der Dampfphase bei Aktivitätsbestimmungen und Revision der Aktivitäten flüssiger Legierungen der Systeme Selen-Thallium, Selen-Wismut und Selen-Antimon
JF  - Zeitschrift für Metallkunde : international journal of materials research and advanced techniques. Bd. 70, H. 2
Y1  - 1979
SN  - 0044-3093 ; 0179-4841
SP  - 109
EP  - 112
ER  - 
TY  - JOUR
A1  - Rateike, Franz-Matthias
A1  - Siebourg, W.
A1  - Schmid, H.
A1  - Anders, S.
T1  - Birefringence - An important property of plastic substrates for magneto-optical storage disks / W. Siebourg ;  H. Schmid ;  F. M. Rateike ; S. Anders ; U. Grigo ; H. Löwer
JF  - Polymer engineering & science / Society of Plastics Engineers. 30 (1990), H. 18
Y1  - 1990
SN  - 0032-3888
SP  - 1133
EP  - 1139
ER  - 
TY  - JOUR
A1  - Rateike, Franz-Matthias
A1  - Weyer, K. G.
A1  - Wiedenmann, H.
A1  - MacGillivray, W. R.
T1  - Observation of absorptive optical bistability in a fabry-perot cavity containing multiple atomic beams /  K. G. Weyer ;  H. Wiedenmann ;  M.  Rateike ; W. R. Mac Gillivray ; P. Meystre ; H. Walther
JF  - Optics communications. 37 (1981), H. 6
Y1  - 1981
SN  - 0030-4018
SP  - 426
EP  - 430
ER  - 
TY  - JOUR
A1  - Rath, V.
A1  - Mottaghy, Darius
T1  - Klimainformation aus dem Untergrund?
JF  - Geographische Rundschau
Y1  - 2014
SN  - 0016-7460
VL  - 66
IS  - 7-8
SP  - 30
EP  - 36
PB  - Westermann
CY  - Braunschweig
ER  - 
TY  - JOUR
A1  - Rath, V.
A1  - Mottaghy, Darius
T1  - Smooth inversion for ground surface temperature histories: estimating the optimum regularization parameter by generalized cross-validation
JF  - Geophysical Journal International
Y1  - 2007
U6  - http://dx.doi.org/10.1111/j.1365-246X.2007.03587.x
SN  - 1365-246X
VL  - 171
IS  - 3
SP  - 1440
EP  - 1448
ER  - 
TY  - JOUR
A1  - Reger, Vitali
A1  - Kuhnhenne, Markus
A1  - Hachul, Helmut
A1  - Döring, Bernd
A1  - Blanke, Tobias
A1  - Göttsche, Joachim
T1  - Plusenergiegebäude 2.0 in Stahlleichtbauweise
JF  - Stahlbau
Y1  - 2019
U6  - http://dx.doi.org/10.1002/stab.201900034
SN  - 1437-1049 (E-journal), 0038-9145 (print)
VL  - 88
IS  - 6
SP  - 522
EP  - 528
PB  - Ernst & Sohn
CY  - Berlin
ER  -