Mechanisms of Action of Particle Fouling on Structured Heat-Transferring Surfaces
The targeted structuring of heat-transferring surfaces, for example by dents or ribs, can increase the efficiency of compact heat exchangers or component cooling systems. Such surface structuring, however, favors particle fouling, therefore the deposition of suspended particles, such as e.g. Sand, mud or corrosion products. An evaluation of structured surfaces is usually carried out with the aid of thermohydraulic efficiency, the ratio of pressure loss increase to heat transfer increase, which, however, does not allow for the influence of particle deposits. Further, no statement can be made as to how local turbulent structures within the system affect particle deposition.
The aim of this DFG-funded project is the development of a universal method for the prediction of particulate fouling on structured surfaces, especially dentsurfaces. The method is based on a combination of Lagrangian particle tracking to describe the disperse phase (fouling particles) as well as spatially and temporally resolved large-eddy simulations for the calculation of continuous phases (carrier fluid). This procedure not only enables the evaluation of the reduced thermal-hydraulic efficiency due to particle deposition, but also the investigation of the interactions between turbulent flow structures and particulate fouling. High-resolution experimental investigations at the ICTV of the TU Braunschweig also enable the validation of the new process and give a detailed insight into the different processes and stages of particle fouling.
Project Related Publications (selection):
- Kasper R., Turnow J., & Kornev N. (2019). Simulation of particulate fouling and its influence on friction loss and heat transfer on structured surfaces using a phase-changing mechanism. In Nóbrega J. M., & Jasak H., editors, OpenFOAM: Selected Papers of the 11th Workshop, chapter 31, 266-290, Springer Nature Switzerland AG. https://doi.org/10.1007/978-3-319-60846-4_31
- Kasper R., Deponte H., Michel A., Augustin W., Turnow J., Scholl S., & Kornev N. (2018). Numerical investigation of the interaction between local flow structures and particulate fouling on structured heat transfer surfaces. International Journal of Heat and Fluid Flow, 71, 68-79. https://doi.org/10.1016/j.ijheatfluidflow.2018.03.002
- Kasper R., Turnow J., & Kornev N. (2017). Numerical modeling and simulation of particulate fouling of structured heat transfer surfaces using a multiphase Euler-Lagrange approach.International Journal of Heat and Mass Transfer, 115, 932–945. https://doi.org/10.1016/j.ijheatmasstransfer.2017.07.108
- Kasper R., Turnow J., & Kornev N. (2019). Prediction of particulate fouling on structured heat transfer surfaces using multiphase Eulerian-Lagrangian LES. Eleventh International Symposium on Turbulence and Shear Flow Phenomena (TSFP11), July 30 - August 2 2019, Southampton, UK. (accepted for presentation)
- Kasper R., Turnow J., & Kornev N. (2018). Eulerian-Lagrangian LES of particulate fouling on structured heat transfer surfaces. Ninth International Symposium on Turbulence, Heat and Mass transfer (THMT9), July 10-13 2018, Rio de Janeiro, Brazil.
- Kasper R., Turnow J., & Kornev N. (2017). Numerical investigation of the interaction between local flow structures and particulate fouling on structured heat transfer surfaces. Tenth International Symposium on Turbulence and Shear Flow Phenomena (TSFP10), July 6-9 2017, Chicago-IL, USA.
- Kasper R., Turnow J., & Kornev N. (2017). Thermo-hydraulic analysis of structured heat transfer surfaces under consideration of particulate fouling using a multiphase Eulerian-Lagrangian method. Heat Exchanger Fouling and Cleaning Conference XII, June 11-16 2017, Aranjuez (Madrid), Spain.
- Kasper R., Turnow J., Klunker J., & Kornev N. (2015). Simulation of particle fouling and its influence on friction loss and heat transfer on structured surfaces using Phase changing mechanism.8th International Symposium on Turbulence, Heat and Mass Transfer (THMT8), September 15-18 2015, Sarajevo, Bosnia and Herzegovina.
Institute of Chemical and Thermal Process Engineering (ICTV), Technical University of Braunschweig
1. Funding Phase: 09/2015 - 02/2019
2. Funding Phase: 03/2019 - 02/2022