Items where Author is "Rahmani, R"

Article

Umer, J, Morris, N, Rahmani, R, Balakrishnan, S and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2020) Nanoscale frictional characterisation of base and fully formulated lubricants based on activation energy components. Tribology International, 144 (106115). ISSN 0301-679X

Dolatabadi, N, Forder, M, Morris, N, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Howell-Smith, S (2020) Influence of advanced cylinder coatings on vehicular fuel economy and emissions in piston compression ring conjunction. Applied Energy, 259 (114129). ISSN 0306-2619

Turnbull, R, Dolatabadi, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2020) An assessment of gas power leakage and frictional losses from the top compression ring of internal combustion engines. Tribology International, 142 (105991). ISSN 0301-679X

Humphrey, E, Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Multiscale boundary frictional performance of diamond like carbon coatings. Tribology International . ISSN 0301-679X

Kozuch, E, Nomikos, P, Rahmani, R, Morris, N and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Effect of shaft surface roughness on the performance of radial lip seals. Lubricants, 6 (4). p. 99. ISSN 2075-4442

Teo, WJ, Dolatabadi, N, Rahmani, R, Morris, N and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Combined analytical and experimental evaluation of frictional performance of lubricated untextured and partially textured sliders. Lubricants, 6 (4). p. 88. ISSN 2075-4442,

Fatourehchi, E, Shahmohamadi, H, Mohammad Pour, M, Rahmani, R, Theodossiades, S and Rahnejat, H (2018) Thermal Analysis of an Oil Jet-Dry Sump Transmission Gear under Mixed-Elastohydrodynamic Conditions. Journal of Tribology, 140 (5). 051502.

Humphrey, E, Morris, N, Leighton, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Multiscale friction in lubricant-surface systems for high performance transmissions under mild wear. Tribology Letters, 66 (77). ISSN 1023-8883

Paouris, LI, Rahmani, R, Theodossiades, S, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Hunt, G and Barton, W (2018) Inefficiency predictions in a hypoid gear pair through tribodynamics analysis. Tribology International, 119 . pp. 631-644. ISSN 0301-679X

Umer, J, Morris, N, Leighton, M, Rahmani, R, Howell-Smith, SJ, Wild, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Asperity level tribological investigation of automotive bore material and coatings. Tribology International, 117 . pp. 131-140. ISSN 0301-679X

Morris, N, Shahmohamadi, H, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Garner, C (2018) Combined experimental and multiphase computational fluid dynamics analysis of surface textured journal bearings in mixed regime of lubrication. Lubrication Sciences .

Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Enhanced performance of optimised partially textured load bearing surfaces. Tribology International, 117 . pp. 272-282. ISSN 0301-679X

Gkinis, T, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2017) Effect of clutch lining frictional characteristics on take-up judder. Proceedings of institution of Mechanical Engineers, Part K: journal of multi-body dynamics, 231 (3). pp. 493-503. ISSN 1464-4193

Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2017) A hydrodynamic flow analysis for optimal positioning of surface textures. IMECHE Part J: Journal of Engineering Tribology, 231 (9). pp. 1140-1150. ISSN 1350-6501

Shahmohamadi, H, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Garner, C and Balodimos, N (2017) Thermohydrodynamics of lubricant flow with carbon nanoparticles in tribological contacts. Tribology International, 113 . pp. 50-57. ISSN 0301-679X

Bewsher, R, Turnbull, R, Mohammadpour, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Offner, G and Knaus, O (2017) Effect of cylinder de-activation on the tribological performance of compression ring conjunction. Proceedings of the Institution of Mechanical Engineers Part J: Journal of Engineering Tribology, 231 (8). pp. 997-1006. ISSN 1350-6501

Leighton, M, Nicholls, TA, De la Cruz, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2017) Combined lubricant-surface system perspective: multi-scale numerical-experimental investigation. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 231 (7). pp. 910-924. ISSN 1350-6501

Dolatabadi, N, Rahmani, R, Theodossiades, S, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Blundell, G and Bernard, G (2017) Tribodynamics of a new declutch mechanism aimed for engine downsizing in off-road heavy-duty vehicles. SAE Technical Papers, 2017-0 . ISSN 0148-7191

Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Fitzsimons, B and Dowson, D (2017) The effect of cylinder liner operating temperature on frictional loss and engine emissions in piston ring conjunction. Applied Energy, 191 . pp. 568-581. ISSN 0306-2619

Baker, C, Theodossiades, S, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Fitzsimons, B (2017) On the transient three dimensional tribodynamics of internal combustion engine top compression ring. Journal of Engineering for Gas Turbines and Power: Transactions of the ASME, 139 (6). 062801. ISSN 0742-4795

Gore, M, Morris, N, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, King, P and Howell-Smith, SJ (2017) A combined analytical-experimental investigation of friction in cylinder liner inserts under mixed and boundary regimes of lubrication. Lubrication Science, 29 (5). pp. 293-316. ISSN 0954-0075

Su, H, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2017) Performance evaluation of bidirectional dry gas seals with special groove geometry. Tribology Transactions, 60 (1). pp. 58-69. ISSN 1040-2004

Su, H, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2016) Thermohydrodynamics of bidirectional groove dry gas seals with slip flow. International Journal of Thermal Sciences, 110 . pp. 270-284. ISSN 1290-0729

Leighton, M, Morris, N, Gore, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and King, PD (2016) Boundary Interactions of Rough non-Gaussian Surfaces. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 230 (11). pp. 1359-1370. ISSN 1350-6501

Paouris, L, Rahmani, R, Theodossiades, S, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Hunt, G and Barton, W (2016) An analytical approach for prediction of elastohydrodynamic friction with inlet shear heating and starvation. Tribology Letters, 64 (1). ISSN 1023-8883

Gore, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and King, P (2016) Assessment of friction from compression ring conjunction of a high performance internal combustion engine: a combined numerical and experimental study. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 230 (12). pp. 2073-2085. ISSN 0954-4062

Leighton, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2016) Surface-specific flow factors for prediction of friction of crosshatched surfaces. Surface Topography: Metrology and Properties, 4 (1).

Leighton, M, Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2016) Surface specific asperity model for prediction of friction in boundary and mixed regimes of lubrication. Meccanica, 52 (1). pp. 21-33. ISSN 0025-6455

Morris, NJ, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, King, P and Howell-Smith, S (2015) A numerical model to study the role of surface textures at top dead center reversal in the piston ring to cylinder liner contact. Journal of Tribology: Transactions of the ASME, 138 (2). 021703-021703. ISSN 0742-4787

Shahmohamadi, H, Mohammad Pour, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Garner, C and Howell-smith, S (2015) On the boundary conditions in multi-phase flow through the piston ring-cylinder liner conjunction. Tribology International, 90 . pp. 164-174. ISSN 0301-679X

Morris, N, Leighton, M, De la Cruz, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Howell-Smith, S (2015) Combined numerical and experimental investigation of the micro-hydrodynamics of chevron-based textured patterns influencing conjunctional friction of sliding contacts. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 229 (4). pp. 316-335. ISSN 1350-6501

Baker, C, Rahmani, R, Theodossiades, S, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Fitzsimons, B (2015) On the effect of transient in-plane dynamics of the compression ring upon its tribological performance. Journal of Engineering for Gas Turbines and Power, 137 (3). ISSN 0742-4795

Shahmohamadi, H, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Garner, C and Dowson, D (2015) Big end bearing losses with thermal cavitation flow under cylinder deactivation. Tribology Letters, 57 (2). pp. 1-17. ISSN 1023-8883

Mohammad pour, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2014) The effect of cylinder de-activation on thermo-friction characteristics of the connecting rod bearing in the new European drive cycle (NEDC). SAE Technical Paper . ISSN 0148-7191

Mohammadpour, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2014) Effect of cylinder deactivation on the tribo-dynamics and acoustic emission of overlay big end bearings. Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics, 228 (2). pp. 138-151. ISSN 1464-4193

Baker, CE, Rahmani, R, Karagiannis, I, Theodossiades, S, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Frendt, A (2014) Effect of compression ring elastodynamics behaviour upon blowby and power loss. SAE Technical Papers, 1 . ISSN 0148-7191

Shahmohamadi, H, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Garner, C and King, P (2013) Thermo-mixed hydrodynamics of piston compression ring conjunction. Tribology Letters, 51 (3). pp. 323-340.

Morris, NJ, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, King, PD and Fitzsimons, B (2012) The influence of piston ring geometry and topography on friction. Proceedings of the Institution of Mechanical Engineers, 227 (2). pp. 141-153.

Rahmani, R, Theodossiades, S, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Fitzsimons, B (2012) Transient elastohydrodynamic lubrication of rough new or worn piston compression ring conjunction with an out-of-round cylinder bore. Proceedings of the Institution of Mechanical Engineers . pp. 284-305.

Baker, CE, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Rahmani, R and Theodossiades, S (2011) Analytical evaluation of fitted piston compression ring: modal behaviour and frictional assessment. SAE Mobilus .

Book Section

Rahnejat, Homer ORCID: 0000-0003-2257-7102, Rahmani, R, Mohammadpour, M and Johns-Rahnejat, PM (2017) Tribology of power train systems. In: ASM Handbook, Volume 18: Friction, Lubrication, and Wear Technology. ASM International, p. 916. ISBN 978-1-62708-141-2

Conference or Workshop Item

Humphrey, E, Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2019) Tribological performance of surface-lubricant systems for automotive transmissions [Abstract]. In: 7th European Conference on Tribology (EcoTrib 2019), 12-14 June 2019, Vienna, Austria.

Umer, J, Morris, N, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Balakrishnan, S (2018) Interaction of dispersants with anti-wear and friction modifiers in contacts representative of piston-ring liner interface Abstract. In: 3rd International Brazilian Conference on Tribology – TriBoBR 2018, 3/12/2018 - 5/12/2018, Florianópolis, Brazil.

Nomikos, P, Kozuch, E, Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Measurement of vibrations affecting the power transmission seals. In: 4th Biennial International Conference on Powertrain Modelling and Control, 10/09/2018 - 11/09/2018, Loughborough University. (Unpublished)

Sivayogan, G, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Prediction of friction in EHL contacts for drivetrain applications. In: 4thBiennial International Conference on Powertrain Modelling and Control (PMC 2018)Testing, Mapping and Calibration, 10/09/2018 - 11/09/2018, Loughborough University.

Umer, J, Leighton, M, Morris, N, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Balakrishnan, S (2018) Tribological investigation of organic and inorganic friction modifiers with varying quantities of dispersants. In: 45th Leeds-Lyon Symposium on Tribology - Smart Tribology Systems, 4-7 September 2018, University of Leeds.

Umer, J, Morris, N, Leighton, M, Rahmani, R, Howell-Smith, SJ and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2018) Characterisation of automotive bore material and coatings using atomic force microscopy. In: TriboUK2018, 12/4/2018 - 13/4/2018, University of Sheffield.

Martinez-Insua-Rodriguez, A, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Smith, MB, Rahmani, R, Morris, N, Umer, J and Howell-Smith, SJ (2018) Study of the lubricant-surface system for in-cylinder applications Abstract. In: TriboUK2016, 14-15 April 2016, University of Leeds.

Humphrey, E, Morris, N, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Rapson, G (2017) A test procedure to investigate lubricant-surface combination for high performance racing transmissions. In: 6th World Tribology Congress, 17/10/17 - 22/10/17, Beijing, China.

Bewsher, R, Mohammadpour, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Offner, G (2017) A study into the effects of cylinder de-activation on the tribological performance of piston ring-liner conjunction. In: TriboUK 2017, 27/4/2017 - 28/4/2017, Imperial College London.

Sivayogan, G, Mohammadpour, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Offner, G and Sopouch, M (2017) Elastohydrodynamic analysis in a multi-physics finite element environment. In: TriboUK 2017, 27/4/2017 - 28/4/2017, Imperial College London.

Umer, J, Morris, N, Leighton, M, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Howell-Smith, SJ and Balakrishnan, S (2017) Nano-scale investigation of frictional characteristics of tribo-films in sliding contacts of representative in-cylinder conditions. In: 6th World Tribology Congress 2017, 17/09/17 - 22/09/17, Beijing, China.

Humphrey, E, Morris, N, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Rapson, G (2017) A test procedure to investigate lubricant-surface combinations for high-performance racing transmissions. In: 6th World Tribology Congress, 17/09/17 - 22/09/17, Beijing, China.

Gkinis, T, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2016) Influence of clutch lining frictional characteristics upon cold and hot take-up judder. In: 3rd Biennial International Conference on Powertrain Modelling and Control: Testing, Mapping and Calibration, 7/9/16-9/9/16, Loughborough University. (Unpublished)

Gkinis, T, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2016) Effects of sliding velocity and clamp load on the coefficient of friction in the study of self-exited vibrations (judder) in automotive clutches abstract. In: 13th TriboUK, 14/4/16-15/4/16, University of Leeds. (Unpublished)

Morris, N, Leighton, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2016) Hydrodynamic flow analysis for determination of the location of surface texture features. In: 43rd Leeds-Lyon Symposium on Tribology, 6/9/16-9/9/16, University of Leeds.

Umer, J, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Rahmani, R, King, P, Martinez-Insua-Rodriguez, A and Morris, N (2016) Lubricant-surface system mitigating in-cylinder friction. In: TriboUK 2016, 14/4/16-15/4/16, University of Leeds.

Paouris, L, Theodossiades, S, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Hunt, G (2015) A hypoid gear pair tribo-dynamic model taking into account the rheological behaviour of fully formulated gear lubricants. In: 13th International Conference on Dynamical Systems – Theory and Applications, 7/12/15-10/12/15, Lodz, Poland. (Unpublished)

Shahmohamadi, H, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Garner, C (2015) CFD Modeling of Cavitation Flow in Journal Bearing Lubrication. In: The European Conference on Tribology 2015, 3/6/15-5/6/15, Lugano, Switerland. (Unpublished)

Leighton, M, Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2015) Asperity Contact Modelling for Measured Surfaces. In: 11th International Tribology Conference, 10/3/15-12/3/15, University of Pretoria.

Leighton, M, Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2015) An Averaged Approach to Asperity Contact Interactions for Non-Gaussian Lubricated Surfaces. In: 42nd Leeds-Lyon Symposium on Tribology, 7/9/15-9/9/15, Lyon, France.

Morris, N, Shahmohamadi, H, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2015) A CFD Study Comparing Surface Texture Features on Stationary and Entraining Surfaces. In: 42nd Leeds-Lyon Symposium on Tribology, 7/9/15-9/9/15, Lyon, France. (Unpublished)

Mohammadpour, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2014) The effect of cylinder de-activation on thermo-friction characteristics of the connecting rod bearing in the New European Drive Cycle (NEDC). In: 8th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference, June 2014, Graz, Austria. (Unpublished)

Morris, N, Leighton, M, Rahmani, R, De-La-Cruz, M and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2014) Friction reduction in piston ring cylinder liner contact using textured surfaces. In: Lubrication, Maintenance and Tribotechnology Conference & Exhibition, 25/6/14-27/6/14, Manchester, UK. (Unpublished)

Shahmohamadi, H, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, King, P and Garner, C (2014) Cavitating flow in engine piston ring-cylinder liner conjunction. In: ASME 2013 International Mechanical Engineering Congress and Exposition, November 15–21, 2013, San Diego, California, USA.

Leighton, M, Morris, N, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2014) The influence of large scale surface roughness on flow factors. In: Balkan Tribology Proceedings, 30/10/14-1/11/14, Sinaia, Romania.

Rahmani, R, Styles, G and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2013) Meniscus formation in the piston compression ring-cylinder liner inlet zone. In: ASME 2012 Internal Combustion Engine Division Fall Technical Conference, September 23–26, 2012, Vancouver, BC, Canada.

Morris, N, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Rahmani, R, King, P and Fitzsimons, B (2013) Performance evaluation of piston compression ring through accelerated wear in engine tests. In: ASME 2012 Internal Combustion Engine Division Spring Technical Conference, May 6–9, 2012, Torino, Piemonte, Italy.

Theaker, M, Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2013) Prediction of ring-bore conformance and contact condition and experimental validation. In: ASME 2012 Internal Combustion Engine Division Spring Technical Conference, May 6–9, 2012, Torino, Piemonte, Italy.

Turturro, A, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Delprete, C and Magro, L (2013) Assessment of friction for cam-roller follower valve train system subjected to mixed non-newtonian regime of lubrication. In: ASME 2012 Internal Combustion Engine Division Spring Technical Conference, May 6–9, 2012, Torino, Piemonte, Italy.

Shahmohamadi, H, Rahmani, R, Rahnejat, Homer ORCID: 0000-0003-2257-7102 and Garner, C (2013) CFD modelling of cavitation phenomenon in piston ring / cylinder liner conjunction. In: 5th World Tribology Congress (WTC 2013), September 8-13 2013, Torino, Italy.

Baker, CE, Rahnejat, Homer ORCID: 0000-0003-2257-7102, Rahmani, R and Theodossiades, S (2011) Analytical evaluation of fitted piston compression ring modal behaviour and frictional assessment. In: SAE 2011 Noise and Vibration Conference and Exhibition.

Other

Rahmani, R and Rahnejat, Homer ORCID: 0000-0003-2257-7102 (2015) Guest editorial Special Issue: Textured Surfaces. SAGE.