Lattice Boltzmann Simulation of Space Charge Effects on Maxwell–Wagner Dielectric Relaxation in Pore and Throat Geometries Saturated with Saline Fluids

This dataset contains the numerical results supporting the manuscript “Lattice Boltzmann Simulation of Space Charge Effects on Maxwell–Wagner Dielectric Relaxation in Pore and Throat Geometries Saturated with Saline Fluids.” The data were generated using a two-dimensional mesoscopic lattice Boltzmann framework that explicitly simulates cation and anion transport, space-charge redistribution, and feedback of the induced internal electric field in idealized pore–throat units saturated with saline fluid. The reported complex relative permittivity represents the Maxwell–Wagner-type contribution calculated from the space-charge dipole moment and does not include the background permittivity of water. The dataset comprises seven UTF-8 encoded CSV files. Five files provide complex relative permittivity spectra obtained by varying temperature from 25 to 225 degrees Celsius, salinity from 100 to 1000 ppm, pore diameter from 20 to 40 nm, throat length from 3 to 15 nm, and throat width from 3 to 15 nm. Each spectrum contains 13 frequency points ranging from 13,888.8889 Hz to 13.9 MHz. In each spectral file, the first column gives frequency in Hz. The first group of parameter columns contains the real part of the complex relative permittivity, while the repeated group of parameter columns contains the imaginary part. Negative imaginary values are retained according to the adopted exp(iωt) convention. The file characteristic_metrics.csv summarizes 26 simulation cases and reports the real part at the lowest simulated frequency, the magnitude of the imaginary-part loss peak, and the corresponding characteristic polarization frequency. The file sensitivity_coefficients.csv provides the sensitivity coefficients of these three spectral metrics to salinity, temperature, pore diameter, throat length, and throat width. Together, these data support the spectral plots, characteristic-metric comparisons, and sensitivity analysis presented in the manuscript.