Dr Mehdi Seddighi
School of Engineering
Faculty of Engineering and Technology
Email: M.Seddighi@ljmu.ac.uk
Telephone: 0151 231 2095
Mehdi holds a BSc in Aerospace Engineering and MSc in Aerodynamics from Iran, and a PhD in Mechanical Engineering from University of Aberdeen. He studied a PhD in Engineering (Fluid Mechanics) on Direct Numerical Simulation of unsteady turbulent-turbulent transient flows, from 2008-2011. Upon completion of his PhD, he joined University of Sheffield, was working as a Research Associate in Turbulence, on several EPSRC, industrial and departmental projects until September 2015 when he joined LJMU as a Lecturer/Senior Lecturer in Fluid Mechanics.
Research interests
- Unsteady turbulent flow (Numerical: DNS/LES; Experiment: PIV/LDV)
- Bypass transition in turbulent-turbulent transient flow (Smooth-wall, Rough wall)
- Control of turbulent flow
- Simulation of pulsatile blood flow
- Hydrodynamics
- Marine Renewable Energy
- Turbulent flow over rough surfaces
Web addresses
ResearchGate
GoogleScholar
Current Projects
- Development of Very Low Head Tidal Turbine, Innovate UK, £30,978, 2023-2025, PI.
- On the Development of a Novel Approach in Modelling of Turbulent Pulsating Flows, EPSRC, £259,481, 2020-2023, PI, with Charles Moulinec (STFC Laboratories).
Completed Projects
- Development of next generation of Anilox Rolls and Sleeves, Innovate UK, £396,431, 2019-2021, CoI, with Martin Sharp (PI).
Research Team:
1) Dr Mehdi Seddiq (Post-docoral Research Associate)
Project: Development of next generation of Anilox Rolls and Sleeves (InnovateUK funded project)
Ink trasnfer between anilox and flexo-plate rollers: U-type cell shape
2) Dr Osama Maklad (Post-docoral Research Associate)
Project: On the Development of a Novel Approach in Modelling of Turbulent Pulsating
Flows (EPSRC funded project)
3) Mr Jack Campbell (PhD student; 2019-)
PhD title: Study of turbulence and heat transfer in pulsating flows
Despite extensive research available in the literature, on effects of pulsating flow with heat transfer, our understanding of turbulence behaviour and heat transfer in such flows is limited. The aim of this project is to investigate detailed turbulence structure and heat transfer performance in channel flows. The study use Direct Numerical Simulations (DNS) and Large Eddy Simulations (LES) accompanied by investigation using PIV / LDV physical experiments.
4) Mr Leon Newton (PhD student; 2019-)
PhD title: A study of modelling of turbulent flow over patterned and rough surfaces
The proposed PhD project aims to improve predictions, and reduce CFD simulation time, by studying detailed flow structure and friction drag on patterned surfaces and modelling these surfaces using the slip-length concept. The research study both steady and unsteady flow conditions over various roughness regimes. The research will also investigate further our recent finding that the nature of turbulence response of a rough-wall transient channel flow starting from a steady turbulent flow resembles the boundary layer roughness-induced laminar-turbulent transition (Seddighi et al., 2015).
5) Mr Tobi Onasanya (PhD student; 2021-)
PhD title: Investigation of wall shear stress and flow behaviour in pulsating blood flows in large arteries
Understanding flow dynamics in pulsating flows is a crucial factor in predicting flow behaviour and subsequently arterial plaque rupture in Atherosclerosis disease. The aim of this project is to investigate effect of various pulsatile parameters on flow behaviour in some large veins. This process is simulated using DNS (Direct Numerical Simulation) and LES (Large Eddy Simulation) accompanied by experimental data which will be obtained in collaboration with the group’s project partner.
Former members:
1) Dr Khaled Takrouri (PhD student; 2016-2020)
PhD title: Study of drag reduction over a novel textured surface
The project studied detailed flow structure of flow over smooth and a novel biomimetic textured surface. The simulations were carried using our in-house DNS (Direct Numerical Simulation) and LES (Large Eddy Simulation) computer codes, CHAPSim. The DNS code is parallelised using a hybrid MPI / MP approach by our group and has been used successfully on several projects.
2) Mehmet Caglar (Visiting student; October 2019 - January 2020)
3) Sebastiano Giorgi (Visiting student; June 2018 - September 2018)
Opportunities:
o Postdoctoral Positions
Postdoctoral Research Associate in Fluid Mechanics
o PhD positions
Dr Seddighi is currently seeking motivated students with strong background in physics or engineering for PhD projects on the following areas:
- Study of blood flow in arteries with atherosclerotic plaque rupture
- Control of turbulent flow using micro-patterned textured surfaces
- Turbulent-turbulent transient flow over smooth and rough surfaces
Current Teaching
- Fluid Mechanics I (Level 4)
- Fluid Mechanics III (Level 6) (Viscous flow, boundary layer theory - Physical descriptions, , boundary layer theory - Prandtl BL Equation, , Blasius solution, von Karman's momentum integral equation)
- Engineering Analysis - CFD part (Level 6)
- Computational Fluid Dynamics (Level 7, MSc) (Introduction to CFD/Ipython Notebook, Steady diffusion problems ( Ipython Notebook; html), Introduction to numerical solution for linear algebraic equations, Steady convection-diffusion problems, Steady N.S. equation - SIMPLE algorithm, Unsteady N.S. equation – Chorin (projection) algorithm, Verification & Validation in CFD, Introduction to Turbulence - RANS)
Academic appointments
Reader in Fluid Mechanics, School of Engineering, Liverpool John Moores University, 2021 - present
Lecturer / Senior Lecturer in Fluid Mechanics, School of Engineering, Liverpool John Moores University, 2015 - 2021
Post-doc Research Associate in Turbulence, Department of Mechanical Engineering, University of Sheffield, 2011 - 2015
Highlighted publications
Taylor P, Seddighi M. 2024. Turbulent–turbulent transient concept in pulsating flows Journal of Fluid Mechanics, 982 :A20-1 DOI Publisher Url Public Url
Seddighi M, He S, Pokrajac D, O'Donoghue T, Vardy AE. 2015. Turbulence in a transient channel flow with a wall of pyramid roughness Journal of Fluid Mechanics, 781 :226-260 DOI Publisher Url Public Url
Journal article
Ghane-Tehrani E, Ziaei-Rad M, Seddighi M. 2024. Detached eddy simulation of traffic-induced air pollution in an urban highway with complex surrounding morphology Atmospheric Pollution Research, DOI Publisher Url Public Url
Taylor P, Seddighi M. 2024. Turbulent–turbulent transient concept in pulsating flows Journal of Fluid Mechanics, 982 :A20-1 DOI Publisher Url Public Url
Tabrizian A, Tatar M, Masdari M, Eivazi H, Seddighi M. 2020. An experimental study on boundary layer transition detection over a pitching supercritical airfoil using hot-film sensors International Journal of Heat and Fluid Flow, 86 DOI Publisher Url Public Url
Seddighi M, Allanson D, Rothwell G, Takrouri K. 2020. Study on the use of a combination of IPython Notebook and an industry‐standard package in educating a CFD course Computer Applications in Engineering Education, DOI Author Url Publisher Url Public Url
Troelsen P, Wilkinson D, Seddighi M, Allanson D, Falkingham PL. 2019. Functional morphology and hydrodynamics of plesiosaur necks: Does size matter? Journal of Vertebrate Paleontology, 39 DOI Author Url Publisher Url Public Url
Mathur A, Seddighi M, He S. 2018. Transition of Transient Channel Flow with High Reynolds Number Ratios Entropy, 20 DOI Author Url Publisher Url Public Url
Seddighi M. 2017. Temporal acceleration of a turbulent channel flow Mathur A, Gorji S, He S, Vardy AE, O'Donoghue T, Pokrajac D. Journal of Fluid Mechanics, 835 :471-490 DOI Publisher Url Public Url
He S, He K, Seddighi M. 2016. Laminarisation of flow at low Reynolds number due to streamwise body force Journal of Fluid Mechanics, 809 :31-37 DOI Publisher Url Public Url
He K, Seddighi M, He S. 2015. DNS study of a pipe flow following a step increase in flow rate International Journal of Heat and Fluid Flow, 57 :130-141 DOI Publisher Url Public Url
Seddighi M, He S, Pokrajac D, O'Donoghue T, Vardy AE. 2015. Turbulence in a transient channel flow with a wall of pyramid roughness Journal of Fluid Mechanics, 781 :226-260 DOI Publisher Url Public Url
He S, Seddighi M. 2015. Transition of transient channel flow after a change in Reynolds number Journal of Fluid Mechanics, 764 :395-427 DOI Publisher Url
Gorji S, Seddighi M, Ariyaratne C, Vardy AE, O'Donoghue T, Pokrajac D, He S. 2014. A comparative study of turbulence models in a transient channel flow Computers and Fluids, 89 :111-123 DOI Publisher Url
Seddighi M, He S, Vardy AE, Orlandi P. 2014. Direct numerical simulation of an accelerating channel flow Flow, Turbulence and Combustion, 92 :473-502 DOI Publisher Url
He S, Seddighi M. 2013. Turbulence in transient channel flow Journal of Fluid Mechanics, 715 :60-102 DOI Publisher Url
Seddighi M, He S, Orlandi P, Vardy AE. 2011. A comparative study of turbulence in ramp-up and ramp-down unsteady flows Flow, Turbulence and Combustion, 86 :439-454 DOI Publisher Url
Chapters
Sharp M, Ghahramani, NH, Seddighi M, Morgan M. 2022. Enhancing Surface Heat Transfer Characteristics Using Laser Texturing Kazi SN. Heat Transfer-Fundamentals, Enhancement and Applications IntechOpen 978-1-80355-940-7 DOI Author Url Publisher Url Public Url
Conference publication
Ahuir-Torres JI, Sharp MC, Seddighi M. 2020. Influence of the surface roughness and pulse energy in the production of dimple features on Cr2O3 surfaces Procedia CIRP, 11th CIRP Conference on Photonic Technologies 94 :930-935 DOI Publisher Url Public Url
Seddighi M, He S. 2017. Turbulent-turbulent transient flow in a transitionally rough regime International Symposium on Turbulence and Shear Flow Phenomena, TSFP10
Seddighi M, He S. 2017. Study of transient flow over pyramid roughness in a transitionally rough regime 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017, 3
He S, Mathur A, Seddighi M, Gorji S. 2017. Experimental study and large eddy simulation of accelerating flow from an initial turbulent flow 10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017, 2 DOI Publisher Url
Khosh Aghdam S, Ricco P, Seddighi M. 2015. Turbulent drag reduction by hydrophobic surfaces with shear-dependent slip length 15th European Turbulence Conference
Seddighi M, He S, Vardy AE, O’Donoghue T, Dubravka P. 2015. Near-wall behaviour of transient flow in a channel with distributed 3-D roughness International Symposium on Turbulence and Shear Flow Phenomena, TSFP9 DOI Publisher Url
Mathur A, Seddighi M, He S. 2015. Effect of high Reynolds number ratio on transition of transient channel flow Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer, 0 :127-130 DOI Publisher Url
He S, Seddighi M, Gorji S, Mathur A. 2015. Transition of Transient Turbulent Channel Flow Procedia Engineering, 126 :34-38 DOI Publisher Url
Seddighi M, He S, Vardy AE, O'Donoghue T, Pokrajac D. 2013. DNS of a transitionally rough channel flow with a 3-D roughness International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013, 3 DOI Publisher Url
Seddighi M, He S. 2012. Turbulence structure in a rapidly accelerating channel flow DOI Publisher Url
Seddighi M, He S, Orlandi P, Vardy AE. 2009. A comparative study of turbulence in a ramp-up and a ramp-down flow Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer, Turbulence, Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer :E-0169 DOI Publisher Url
Soltani MR, Seddighi M, Masdari M. 2007. Prediction of transition point on an oscillating airfoil using neural network FEDSM 2007: PROCEEDINGS OF THE 5TH JOINT ASME/JSME FLUIDS ENGINEERING SUMMER CONFERENCE, VOL 2, PTS A AND B, 5th Joint ASME/JSME Fluids Engineering Summer Conference :33-39 DOI Author Url Publisher Url
Soltani M, Seddighi M, Rasi F. 2006. Comparison of the unsteady loads of an airfoil in the pitching and plunging motions 2006 ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006, 2006 DOI