Direct Numerical Simulation laboratory

Filtration Efficiency

Assumed that the particle concentration is sufficiently small, the effect of the particles on the gas or liquid flow can be neglected as well as particle-particle interactions. Then the filtration efficiency of a porous medium can be computed with DNSlab by computing a steady-state flow field by numerical solution of the Navier-Stokes-equations and by subsequent computation of the particle trajectories and possible collisions with the porous structure. The ratio of the number of deposited particles to the total number of particles in a size fraction gives the fraction deposition rates.

Slide Generate or Import 3D Models
of Pore Structures
Slide Permeation by Gas or Liquid Slide Particle Trajectories Slide Computed Fraction Deposition Rates

Publications on Filtration Efficiency Computation with DNSlab

[16] Kerner, M.; Schmidt, K.; Schumacher, S.; Asbach, C.; Antonyuk, S.: Electret Filters — From the Influence of Discharging Methods to Optimization Potential. Atmosphere 12 (2021), no. 1, 65 DOI: 10.3390/atmos12010065

[15] Kerner, M.; Schmidt, K.; Schumacher, S.; Asbach, C.; Antonyuk, S.: Ageing of electret filter media due to deposition of submicron particles - Experimental and numerical investigations. Separation and Purification Technology 251 (2020) 117299 DOI: 10.1016/j.seppur.2020.117299

[14] Kerner, M.; Schmidt, K.; Schumacher, S.; Puderbach, V.; Asbach, C.; Antonyuk, S.: Evaluation of electrostatic properties of electret filters for aerosol deposition. Separation and Purification Technology 239 (2020) 116548 DOI: 10.1026/j.seppur.2020.116548

[13] Kerner, M.; Schmidt, K.; Schumacher, S.; Asbach, C., Antonyuk, S.: Numerical and experimental investigations on loading-dependent particle deposition in electret filter media. FILTECH 2019 Proceedings

[12] Kerner, M.; Schmidt, K.; Hellmann, A.; Schumacher, S.; Pitz, M.; Asbach, C.; Ripperger, S.; Antonyuk, S.: Numerical and experimental study of submicron aerosol deposition in electret microfiber nonwovens. Journal of Aerosol Science 122 (2018) pp. 32-44 DOI: 10.1016/j.jaerosci.2018.05.004

[11] Kerner, M.; Schmidt, K.; Hellmann, A.; Schumacher, S.; Asbach, C.; Antonyuk, S.: 3D simulation and experimental investigation of the coulomb effect in electret filters. FILTECH 2018 Proceedings

[10] Hellmann, A.; Rief, S.; Schmidt, K.; Kocaman, R.T.; Aibibu, D.; Cherif, C.; Ripperger, S.; Antonyuk, S.: Simulation der Partikelabscheidung und des Druckverlustes von Schutz- und Filtertextilien bei einer Gasdurchströmung. Filtrieren und Separieren 31 (2017), no.4, pp. 268-274

[9] Hellmann, A.: Untersuchung der Gasfiltration mit Vliesen und offenen Schaumstrukturen unter Berücksichtigung der numerischen Strömungssimulation. Doctoral thesis, TU Kaiserslautern, 2017

[8] Petersen, L.: Untersuchung der Tiefenfiltration wässriger Suspensionen mit Vliesen. Doctoral thesis, TU Kaiserslautern, 2016

[7] Hellmann, A.; Pitz, M.; Schmidt, K.; Haller, F.; Ripperger, S.: Characterization of an Open-Pored Nickel Foam with Respect to Aerosol Filtration Efficiency by Means of Measurement and Simulation. Aerosol Science and Technology 49 (2015), no. 1, pp. 16-23 DOI: 10.1080/02786826.2014.990555

[6] Schmidt, K.; Haller, F.; Hellmann, A.; Heikamp, W.; Ripperger, S.: Enhanced Analysis of Droplet Separation Efficiency of Knitted Wire Meshes by Optical Particle Counter Measurements and Direct Numerical Simulation based on Tomographies. FILTECH 2015 Proceedings

[5] Schmidt, K.; Hellmann, A.; Pitz, M.; Ripperger, S.: Modeling of NaCl aerosol deposition at electrically charged microfibers. FILTECH 2013 Proceedings

[4] Hellmann, A.; Schmidt, K.; Ripperger, S.: Berechnung der Staubabscheidung in faserförmigen Filtermedien. Filtrieren und Separieren 26 (2012), no. 6, pp. 396-404

[3] Hellmann, A.; Schmidt, K.; Ripperger, S.; Thelen, C.; Möhlmann, C.: Bestimmung der Abscheidewirkung von faserförmigen Filtermedien gegenüber ultrafeinen Partikeln. Gefahrstoffe - Reinhaltung der Luft 72 (2012), no. 11-12, pp. 484-488

[2] Schmidt, K.; Ripperger, S.: Validating the simulation of diesel soot agglomerate deposition in microstructured filter media by means of microsieve examinations. FILTECH 2011 Proceedings

[1] Schmidt, K.: Dreidimensionale Modellierung von Filtermedien und Simulation der Partikelabscheidung auf der Mikroskala. Doctoral thesis, TU Kaiserslautern, 2011