Andreas Bauer
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View article: Comparison of Eddy Current Loss Calculation Techniques for Axial Flux Motors with Printed Circuit Board Windings
Comparison of Eddy Current Loss Calculation Techniques for Axial Flux Motors with Printed Circuit Board Windings Open
In slotless machines, the winding conductors are exposed to the magnetic air gap field, which causes additional eddy current losses, thus decreasing efficiency and affecting thermal utilization. This is the case, inter alia, for axial flux…
View article: Stress path dependence of time-lapse seismic effects in shales: experimental comparison at seismic and ultrasonic frequencies
Stress path dependence of time-lapse seismic effects in shales: experimental comparison at seismic and ultrasonic frequencies Open
SUMMARY Changes in pore pressure within geological reservoirs, due to, for example hydrocarbon production, CO2 and energy storage or wastewater disposal, may cause substantial stress changes in the overburden, altering propagation velociti…
View article: On the low-frequency elastic response of Pierre Shale during temperature cycles
On the low-frequency elastic response of Pierre Shale during temperature cycles Open
SUMMARY Temperature affects elastic rock properties but is less-studied and thus less-understood than pressure and stress. Thermal effects on dispersion are experimentally observed herein from seismic to ultrasonic frequencies: Young’s mod…
View article: On the Effect of CO2 on Seismic and Ultrasonic Properties: A Novel Shale Experiment
On the Effect of CO2 on Seismic and Ultrasonic Properties: A Novel Shale Experiment Open
Carbon capture and storage (CCS) by geological sequestration comprises a permeable formation (reservoir) for CO2 storage topped by an impermeable formation (caprock). Time-lapse (4D) seismic is used to map CO2 movement in the subsurface: C…
View article: Can Heating Induce Borehole Closure?
Can Heating Induce Borehole Closure? Open
The current study shows that heating a cased borehole in low-permeability shale rock can induce plastic deformation, leading to the closure of the casing annulus and decreasing annulus connectivity. The thermally induced borehole closure i…
View article: Reactive instabilities in linear acidizing on carbonates
Reactive instabilities in linear acidizing on carbonates Open
Acid injection, reactive instabilities and wormholing in carbonate reservoirs is investigated through the analysis of the linear acidizing problem theoretically and experimentally. Theoretically acidizing was analyzed by formulating the pr…
View article: Simulating Turbulence Using the Astrophysical Discontinuous Galerkin Code TENET
Simulating Turbulence Using the Astrophysical Discontinuous Galerkin Code TENET Open
In astrophysics, the two main methods traditionally in use for solving the Euler equations of ideal fluid dynamics are smoothed particle hydrodynamics and finite volume discretization on a stationary mesh. However, the goal to efficiently …