Forskarpresentation

Mohammad Jahedi

Forskarpresentation

Mohammad Jahedi

Universitetsadjunkt

Forskningsämne: Energisystem

Mohammad Jahedi investigates the fluid mechanics and heat transfer of a range of cooling technologies using computational and experimental approaches, leading to applications in industrial cooling processes and the design of more efficient and sustainable systems.

“My main focus has been on development of quenching hardening process in recent years both numerically and experimentally. Development of an inverse solution into this application to predict the surface heat transfer data during quenching process. This provides key information about the cooling techniques characteristics. Moreover, two unique and modern test facilities have been built up in the Metal Cooling R&D Living Lab at University of Gävle to investigate the heat transfer characteristics of cooling processes. The main aim of the living lab is to create a long term platform that supports companies in the development of new materials and cooling processes, and to support the formation of new companies based on the new technologies for cooling of metals. The Living lab has been equipped with advance physical test facilities for carrying out hardening cooling experiment, resources for computer simulation, as well as resources for materials testing.”

AKTUELL FORSKNING

Current research activities:

  • Impinging jet technique for cooling of steel – Test bed project

This project focuses on development of the impinging jet technology for cooling of metals from high temperatures. The technology makes it possible to create cooling processes that give the steel improved performance in several respects:

  • Identifying parameters that may effect on quenching hardening process
  • Development of cooling technology to offer flexibility of variation cooling rate over time and over the surface to possibly follow very specific cooling curves, which is of great importance to get the structure and properties you want in the metal.
  • Development of the quenching technique into a sustainable process to save energy, water resources and material consumption in industrial processes.
  • Effect of spatial temporal behavior of a newly developed cooling technology on carbon and stainless steel bar material properties – KKS project

The project aim is to reveal the spatial-temporal behavior of a newly developed cooling technology in order to produce steel bars with excellent properties and to control the phase transformation and residual stresses to achieve optimal performance of the steel bars depending on the application.

LÄS MER OM


Artiklar


Vetenskapliga artiklar, refereegranskade

Jahedi, M. & Moshfegh, B. (2021). Boiling heat transfer characteristics of rotary hollow cylinders with in-line and staggered multiple arrays of water jets. Journal of heat transfer, 143 (11). 10.1115/1.4051835 [Mer information]
Jahedi, M. & Moshfegh, B. (2021). Quenching Hot Rotary Hollow Cylinder by 1-row and 2-row Water Impinging Jet Array. Journal of Fluid Flow, Heat and Mass Transfer, 8, 178-188. 10.11159/jffhmt.2021.020 [Mer information]
Jahedi, M. & Moshfegh, B. (2019). Quenching a rotary hollow cylinder by multiple configurations of water-impinging jets. International Journal of Heat and Mass Transfer, 137, 124-137. 10.1016/j.ijheatmasstransfer.2019.03.066 [Mer information]
Jahedi, M., Berntsson, F., Wren, J. & Moshfegh, B. (2018). Transient inverse heat conduction problem of quenching a hollow cylinder by one row of water jets. International Journal of Heat and Mass Transfer, 117, 748-756. 10.1016/j.ijheatmasstransfer.2017.10.048 [Mer information]

Doktorsavhandling

Jahedi, M. (2021). Experimental and Numerical Investigation of the Quenching Process on Rotary Hollow Cylinder by Multiple Impinging Jets. Diss. (sammanfattning), 2021. Gävle: Gävle University Press. 70 s. (Doctoral thesis 17) Länk [Mer information]

Konferensbidrag

Jahedi, M. & Moshfegh, B. (2020). Effect of Multiple Water Impinging Jet Array on Quenching Hot Rotary Hollow Cylinders. . Ottawa, Canada: International ASET Inc.. 10.11159/ffhmt20.171 [Mer information]
Jahedi, M. & Moshfegh, B. (2017). Experimental study of quenching process on a rotating hollow cylinder by one row of impinging jets. 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics, 12-15 June, 2017, Iguazu Falls, Brazil. Länk [Mer information]
Publicerad av: Eva Wännström Sidansvarig: Gunilla Mårtensson Sidan uppdaterades: 2021-05-10
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