### Abstract

Original language | English |
---|---|

Pages (from-to) | 65303 |

Journal | Measurement Science and Technology |

Volume | 24 |

Issue number | 6 |

DOIs | |

Publication status | Published - 2013 |

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### Bibliographical note

The full text of this item is not available from the repository.### Keywords

- Lorentz force velocimetry
- low conductivity fluids
- optimal magnet configurations

### Cite this

*Measurement Science and Technology*,

*24*(6), 65303. https://doi.org/10.1088/0957-0233/24/6/065303

**Optimal magnet configurations for Lorentz force velocimetry in low conductivity fluids.** / Alferenok, A.; Potherat, Alban; Luedtke, U.

Research output: Contribution to journal › Article

*Measurement Science and Technology*, vol. 24, no. 6, pp. 65303. https://doi.org/10.1088/0957-0233/24/6/065303

}

TY - JOUR

T1 - Optimal magnet configurations for Lorentz force velocimetry in low conductivity fluids

AU - Alferenok, A.

AU - Potherat, Alban

AU - Luedtke, U.

N1 - The full text of this item is not available from the repository.

PY - 2013

Y1 - 2013

N2 - We show that the performances of flowmeters based on the measurement of Lorentz force in duct flows can be sufficiently optimized to be applied to fluids of low electrical conductivity. The main technological challenge is to design a system with permanent magnets generating a strong enough field for the Lorentz force generated when a fluid of low conductivity passes through it to be reliably measured. To achieve this, we optimize the design of a magnet system based on Halbach arrays placed on either side of the duct. In the process, we show that the fluid flow can be approximated as a moving solid bar with practically no impact on the optimization result and devise a rather general iterative optimization procedure, which incurs drastically less computational cost than a direct procedure of equivalent precision. We show that both the Lorentz force and the efficiency of the system (defined as the ratio of the Lorentz force to the weight of the system) can be increased several fold by using Halbach arrays made of three, five, seven or nine magnets on either side of the duct but that this improvement comes at a cost in terms of the precision required to position the system.

AB - We show that the performances of flowmeters based on the measurement of Lorentz force in duct flows can be sufficiently optimized to be applied to fluids of low electrical conductivity. The main technological challenge is to design a system with permanent magnets generating a strong enough field for the Lorentz force generated when a fluid of low conductivity passes through it to be reliably measured. To achieve this, we optimize the design of a magnet system based on Halbach arrays placed on either side of the duct. In the process, we show that the fluid flow can be approximated as a moving solid bar with practically no impact on the optimization result and devise a rather general iterative optimization procedure, which incurs drastically less computational cost than a direct procedure of equivalent precision. We show that both the Lorentz force and the efficiency of the system (defined as the ratio of the Lorentz force to the weight of the system) can be increased several fold by using Halbach arrays made of three, five, seven or nine magnets on either side of the duct but that this improvement comes at a cost in terms of the precision required to position the system.

KW - Lorentz force velocimetry

KW - low conductivity fluids

KW - optimal magnet configurations

U2 - 10.1088/0957-0233/24/6/065303

DO - 10.1088/0957-0233/24/6/065303

M3 - Article

VL - 24

SP - 65303

JO - Measurement Science and Technology

JF - Measurement Science and Technology

SN - 0957-0233

IS - 6

ER -