This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1115/1.2972171 in citations.
Reconstruction of Electric Currents in a Fuel Cell by Magnetic Field Measurements
Reconstruction of Electric Currents in a Fuel Cell by Magnetic Field Measurements
In this paper the tomographic problem arising in the diagnostics of a fuel cell is discussed. This is concerned with how well the electric current density j(r) be reconstructed by measuring its external magnetic field. We show that (i) exploiting the fact that the current density has to comply with...
Saved in:
Personal Name(s): | Lustfeld, H. |
---|---|
Reißel, M. / Schmidt, U. / Steffen, B. | |
Contributing Institute: |
Quanten-Theorie der Materialien; IFF-1 Jülich Supercomputing Center; JSC |
Published in: | Journal of fuel cell science and technology, 6 (2009) S. 021012 - 021020 |
Imprint: |
New York, NY
ASME
2009
|
Physical Description: |
021012 - 021020 |
DOI: |
10.1115/1.2972171 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie Scientific Computing |
Series Title: |
Journal of Fuel Cell Science and Technology
6 |
Subject (ZB): | |
Publikationsportal JuSER |
In this paper the tomographic problem arising in the diagnostics of a fuel cell is discussed. This is concerned with how well the electric current density j(r) be reconstructed by measuring its external magnetic field. We show that (i) exploiting the fact that the current density has to comply with Maxwell's equations it can, in fact, be reconstructed at least up to a certain resolution, (ii) the functional connection between the resolution of the current density and the relative precision of the measurement devices can be obtained, and (iii) a procedure can be applied to determine the optimum measuring positions, essentially decreasing the number of measuring points and thus the time scale of measurable dynamical perturbations-without a loss of fine resolution. We present explicit results for (i)-(iii) by applying our formulas to a realistic case of an experimental direct methanol fuel cell. |