muhammad imran sadiq, wan aizon w. ghopa, mohd. zaki nuawi, mohammad rasidi rasani, nor kamaliana khamis, mohd radzi abu mansor.  (2022).  investigation of stiffness and damping coefficients in fluid film bearing with bio oils and mineral based oil.  - energy report.  419-429. 

muhammad imran sadiq, wan aizon ghopa, mohd zaki nuawi, mohammad rasidi rasani and sofian ibrahim.  (2022).  an experimental investigation of static properties of bio-oils and sae40 oil in journal bearing applications.  - materials.  1-14. 

nur syahirah m.hanafi, wan aizon w.ghopa, rozli zulkifli, shahrir abdullah, zambri harun, mohd radzi abumansor.  (2022).  numerical simulation on the effectiveness of hybrid nanofluid in jet impingement cooling application.  - energy report.  764-775. 

muhammad imran sadiq, wan aizon w. ghopa, mohd zaki nuawi, mohammad rasidi rasani and mohd anas mohd sabri.  (2022).  experimental and numerical investigation of static and dynamic characteristics of bio-oils and sae40 in fluid film journal bearing.  - materials.  1-14. 

sajjad hussain, wan aizon w. ghopa, s. s. k. singh , abdul hadi azman , shahrum abdullah, zambri harun, hawa hishamuddin.  (2022).  vibration-based fatigue analysis of octet-truss lattice infill blades for utilization in turbine rotors.  - materials.  1-24. 

mahir faris abdullah, rozli zulkifli, hazim moria, asmaa soheil najm, zambri harun, shahrir abdullah, wan aizon wan ghopa, noor humam sulaiman.  (2021).  assessment of tio2 nanoconcentration and twin impingement jet of heat transfer enhancement-a statistical approach using response surface methodology.  - energies.  1-29. 

abdullh mansur aldosry, rozli zulkifli, wan aizon wan ghopa.  (2021).  heat transfer enhancement of liquid cooled copper plate with oblique fins for electric vehicles battery thermal management.  - world electric vehicle journal.  1-14. 

shahrum abdullah, salvinder singh karam singh, abdul hadi azman, muhamad razuhanafi mat yazid, hawa hishamuddin, wan aizon wan ghopa, aini hazwani shahrir, ahmad kamal ariffin mohd ihsan, dzuraidah abd. wahab.  (2020).  assessing the safety behaviour of the bus express driving condition from the passengers perspective.  - international journal of integrated engineering.  27-33. 

mahir faris abdullah, humam kareem, rozli zulkifli, zambri harun, shahrir abdullah, wan aizon w. ghopa.  (2019).  heat transfer and flow structure of multiple jet impingement mechanisms on a flat plate for turbulent flow.  - international journal of mechanical and mechatronics engineering.  141-160. 

mahir faris abdullah, rozli zulkifli, zambri harun, shahrir abdullah, wan aizon wan ghopa, asmaa soheil najm, noor humam sulaiman.  (2019).  impact of the tio2 nanosolution concentration on heat transfer enhancement of the twin impingement jet of a heated aluminum plate.  - micromachines.  1-22. 

a.h. azman, s.s.k. singh , w.g.w. aizon, h. hishamuddin, m.r.m. yazid, s. abdullah, a.k. ariffin, d. a. wahab, r. atiq, m.s. solah, a. hamzah.  (2018).  the needs to establish an integrated safety system for express bus.  - international journal of engineering & technology.  1537-1540. 

mahir faris abdullah, rozli zulkifli, zambri harun, shahrir abdullah, wan aizon wan ghopa.  (2018).  experimental and numerical simulation of the heat transfer enhancement on the twin impingement jet mechanism.  - energies.  . 

mahir faris abdullah, rozli zulkifli, zambri harun, shahrir abdullah, wan aizon wan ghopa, ashraf amer abbas.  (2018).  heat transfer augmentation based on twin impingement jet mechanism.  - international journal of engineering & technology.  . 

ashraf a. abbas, wan aizon w. ghopa, sohif mat, kwing-so choi, mahir faris abdullah, zambri harun.  (2018).  surface roughness effects on turbulent boundary layer structure of naca 0026 airfoil.  - international journal of engineering & technology.  . 

mahir faris abdullah, rozli zulkifli, zambri harun, shahrir abdullah, wan aizon w.ghopa.  (2017).  studying of convective heat transfer over an aluminum flat plate based on twin jets impingement mechanism for different reynolds number.  - international journal of mechanical & mechatronics engineering (ijmme) the international journals of engineering and sciences (ijens).  1-16. 

siti fatimah hassan, wan fathul hakim w zamri, intan fadhlina mohamed, wan aizon wan ghopa, muhammad faiz md din.  (2017).  influence of bilayer structure and sublayer distance on the hardness of multilayer thin film tialn and crn.  - journal of mechanical engineering.  201-212. 

mohd radzi abu mansor, hoo choon lih, norhidayah mat taib, w. ghopa wan aizon, zul ilham.  (2017).  the effect of increasing the percentage of hydrogen added to methane in direct injection spark ignition engine to the composition of co and co2 emissions.  - arpn journal of engineering and applied sciences.  3145-3150. 

abdullah, m.f., zulkifli, r., harun, z., abdullah, s., ghopa, w.a.w., abbas, a.a..  (2017).  experimental investigation on comparison of local nusselt number using twin jet impingement mechanism.  - international journal of mechanical and mechatronics engineering.  60-75. 

adnan kadhim rashid, mohd radzi abu mansor, w ghopa wan aizon, zambri harun, wan mohd faizal wan mahmood.  (2016).  an experimental study of the performance and emissions of spark ignition gasoline engine.  - international journal of automotive and mechanical engineering.  3540-3554. 

wan fathul hakim w zamri, b kosasih, k tieu, wan aizon wan ghopa, m faiz md din, ahmad muhammad aziz, siti fatimah hassan.  (2016).  a simulation of friction behavior on oxidised high speed steel (hss) work rolls.  - arpn journal of engineering and applied sciences.  7394-7400. 

zambri harun, wan aizon w. ghopa, shahrir abdullah, m. izhar ghazali, ashraf amer abbas, mohd rasidi rasani, rozli zulkifli, wan mohd faizal wan mahmood, mohd radzi abu mansor, zulkhairi zainol abidin.  (2016).  the development of a multi purpose wind tunnel.  - jurnal teknologi.  63-70. 

m. izhar ghazali, zambri harun, wan aizon wan ghopa and ashraf a. abbas.  (2016).  computational fluid dynamic simulation on naca 0026 airfoil with v-groove riblets.  - international journal on advanced science, engineering and information technology.  529-533. 

mohd radzi abu mansor; tan chun hyiin; nik muhammad hafiz; wan mohd faizal wan mahmood; w ghopa wan aizon; shahrir abdullah.  (2015).  fundamental study on combustion characteristics of direct injection gaseous fuel.  - arpn journal of engineering and applied sciences.  7375-7379. 

wan aizon w ghopa, zambri harun, ken-ichi funazaki, takemitsu miura.  (2015).  aero-thermal performances of leakage flows injection from the endwall slot in linear cascade of high-pressure turbine.  - journal of thermal science.  49-57. 

w ghopa wan aizon, ken-ichi funazaki, mohd radzi abu mansor.  (2014).  aerodynamics performance of endwall film cooling under the influence of purge flow in high pressure turbine cascade.  - applied mechanics and materials.  119-124. 

w ghopa wan aizon ,ken-ichi funazaki, takemitsu miura.  (2013).  purge flow effect on aerodynamics performance in high-pressure turbine cascade.  - journal of mechanical science and technology.  1611-1617.