Preparation Methods and Challenges of Hybrid Nanofluids: A  Review

Wajiha Tasnim Urmi; A.S Shafiqah; Md. Mustafizur Rahman; Kumaran Kadirgama; Md Abdul Maleque

Authors

Wajiha Tasnim Urmi Department of Mechanical Engineering, College of Engineering, Universiti Malaysia Pahang, Lebuhraya Tun Razak 26300 Kuantan, Pahang, Malaysia
A.S Shafiqah Department of Mechanical Engineering, College of Engineering, Universiti Malaysia Pahang, Lebuhraya Tun Razak 26300 Kuantan, Pahang, Malaysia
Md. Mustafizur Rahman Department of Mechanical Engineering, College of Engineering, Universiti Malaysia Pahang, Lebuhraya Tun Razak 26300 Kuantan, Pahang, Malaysia
Kumaran Kadirgama Automotive Engineering Centre, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia
Md Abdul Maleque Department of Manufacturing and Materials Engineering, International Islamic University Malaysia, Kulliyah of Engineering, Jalan Gombak, 53100 Kuala Lumpur, Malaysia

Keywords:

Nanoparticle, hybrid nanofluid, thermophysical property, surfactant, stability

Abstract

The recent studies on nanotechnology have reported rapid development of nanofluids in various aspects due to the enhanced thermophysical and heat transfer properties of nanofluids. This paper reviews the preparation methods and some challenging issues of hybrid nanofluids during the Preparation of hybrid nanofluids. One-step and two?step are mainly the preparation methods of hybrid nanofluids. Compared to the one?step method, the two-step method is a widely used technique for preparing nanofluids due to its simplicity, whereas this technique has a complexity of achieving stability of hybrid nanofluids. On the contrary, the one-step is very flexible for achieving uniformity of nanofluids with comparatively high production cost. Some researchers followed various techniques such as surfactant addition, surface treatment, and pH modification for preparing a durable nanofluid. However, these methods also have their limitation, such as degrading the thermal attributes of hybrid nanofluids. So, future studies need to address these challenges along with the cost analysis during preparing the hybrid nanofluids.