Ratschow, Aaron D. ; Stein, Sigrun ; Gross, Hans‐Jürgen (2023)
Charge distribution in turbulent flow of charged liquid — Modeling and experimental validation.
In: Process Safety Progress, 2023, 42 (2)
doi: 10.26083/tuprints-00024306
Artikel, Zweitveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
Electric discharges due to the flow of charged organic liquids are a common ignition source for explosions in the chemical and process industry. Prevention of incidents requires knowledge of electric fields above the surface of charged liquids. Quantitative methods often estimate electric fields based on simplifying assumptions like homogeneous volumetric charge distribution and neglect of surface charge. More detailed electrohydrodynamic (EHD) models are only available for laminar flow regimes. This work presents a model for forced turbulent EHD flows of dielectric liquids based on Reynolds‐averaged Navier–Stokes equations that predicts the electric field in the gas phase in good agreement with our experiments. We observe diminishing surface charge accumulation at the liquid surface with increasing flow velocities and thereby unify seemingly contradictory previous findings regarding the relevance of surface charge. The model can efficiently be applied to various industrial flow configurations and provide a central tool in preventing electrostatic hazards.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Ratschow, Aaron D. ; Stein, Sigrun ; Gross, Hans‐Jürgen |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Charge distribution in turbulent flow of charged liquid — Modeling and experimental validation |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2023 |
| Verlag: | John Wiley & Sons |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Process Safety Progress |
| Jahrgang/Volume einer Zeitschrift: | 42 |
| (Heft-)Nummer: | 2 |
| DOI: | 10.26083/tuprints-00024306 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/24306 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Electric discharges due to the flow of charged organic liquids are a common ignition source for explosions in the chemical and process industry. Prevention of incidents requires knowledge of electric fields above the surface of charged liquids. Quantitative methods often estimate electric fields based on simplifying assumptions like homogeneous volumetric charge distribution and neglect of surface charge. More detailed electrohydrodynamic (EHD) models are only available for laminar flow regimes. This work presents a model for forced turbulent EHD flows of dielectric liquids based on Reynolds‐averaged Navier–Stokes equations that predicts the electric field in the gas phase in good agreement with our experiments. We observe diminishing surface charge accumulation at the liquid surface with increasing flow velocities and thereby unify seemingly contradictory previous findings regarding the relevance of surface charge. The model can efficiently be applied to various industrial flow configurations and provide a central tool in preventing electrostatic hazards. |
| Freie Schlagworte: | fire and explosion analysis, hazards evaluation, risk assessment |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-243064 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 580 Pflanzen (Botanik) 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Fachgebiet Nano- und Mikrofluidik (NMF) |
| Hinterlegungsdatum: | 04 Aug 2023 12:28 |
| Letzte Änderung: | 07 Aug 2023 06:37 |
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| Zugehörige Links: | |
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