LIFSim 4.0 Software
LIFSim 4.0 is a sophisticated software developed and maintained by our Chair at the University of Duisburg-Essen. This innovative tool is designed to simulate and fit laser-induced fluorescence (LIF) multi-line spectra in reactive media such as flames or gas-phase synthesis processes. By providing detailed simulations of absorption, LIF excitation, and LIF emission spectra for molecules such as NO, SiO, OH, and O2, LIFSim 4.0 aids researchers in measuring concentration and temperature fields, offering critical insights into reaction intermediates distribution and temperature fieds-
The software's modular structure allows for extensive customization and expansion, enabling users to include additional species as needed. LIFSim 4.0 calculates line positions, line broadening, and collisional quenching effects based on spectroscopic data from the literature, ensuring accurate and reliable simulations. This capability is crucial for deriving detection schemes that offer high selectivity and quantitative information, even under varying conditions of temperature, pressure, and bath-gas composition.
Fig 1. Temperature field of the H2/O2 premixed laminar flame
LIFSim 4.0 also includes powerful spectral analysis tools that facilitate the interrogation and examination of sensitive spectral regions. These tools are particularly useful for deriving temperature information from multi-line LIF measurements. The software's library features optimized fitting functions designed to enhance and accelerate the post-processing of LIF images taken at different excitation wavelengths. This enables precise temperature imaging and effective separation of the target LIF signal from background interference, such as broad-band fluorescence or scattering.
In addition to its robust simulation capabilities, LIFSim 4.0 is available as open-source software on GitHub under the AGPL-3.0 license. This openness encourages collaboration and continuous improvement by the diagnostics community. The software supports parallel computing, allowing for the simultaneous processing of spectra from different pixel positions, thereby significantly reducing computation time.
LIFSim 4.0 has been developed with the goal of providing a versatile and reliable tool for the diagnostics community, facilitating advanced research and development in the field of laser-induced fluorescence. By making this powerful tool accessible to a broader audience, our Chair aims to foster a collaborative environment that drives innovation and excellence in spectroscopic diagnostics.