John Chew

PhD in Chemical Engineering, BEng (Hons) Chemical and Process Engineering, BCom Accounting, Finance & Information Systems, Dr

  • 9 WEST 2.08

Accepting PhD Students

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Personal profile

Research interests

My research interest fall into two areas: the first is green cleaning of fouling surfaces, and the second is dynamics of small scale fluid particles in gas-liquid flow systems.

Green cleaning of fouling surfaces:

I have strong interest in the research area related to surface layers. I have been working on issues related to fouling and cleaning of surface layers in the food, textile, polymer processing, membranes and biotechnological industries since 2004. Fluid Dynamic Gauging (FDG) is a technique developed in my research group to measure the thickness of solid layers deposited on a substrate in situ and in real time. The technique is based on the steady flow of a fluid through a nozzle located near the layer surface, so that the device does not touch the layer but senses its presence, by virtue of its influence on the flow rate of the fluid. Measurement of the flow rate tells us the clearance and the thickness can be calculated. In recent years, FDG has been extended to an automated system that can now measure thickness and attachment strength or deformability of fouling layers in situ and in real time. The advances have come through combining experimental measurements and numerical modelling.

Dynamics of small scale fluid particles in gas-liquid flow systems:

Bubbles and droplets, are ubiquitous in everyday life, both in nature and in technology. My research on gas-liquid systems is centred on understanding the hydrodynamics and interfacial interactions of small scaled fluid particles with their continuous phase during the course of their movements in a piece of equipment. The most important feature of the fluid particles that sets them apart from the rigid particles is their mobile surface and their ability to deform during motion. A combination of experimental and computational techniques are used to understand the dynamics of these bubbles is process such as wastewater treatment, fermentation and surface cleaning.

Willing to supervise PhD

Interested in supervising students studying:

  • Green cleaning
  • Membranes
  • Sensors for fouling and cleaning
  • Gas-liquid phase flows
  • Non-Newtonian fluids
  • Gas spearations

Education/Academic qualification

Doctor of Philosophy, University of Cambridge

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Network Recent external collaboration on country level. Dive into details by clicking on the dots.

Projects 2014 2020

Equipment Supply Agreement

Chew, Y.

1/06/16 → …

Project: Research-related fundingOther

Equipment Supply Agreement

Chew, Y.

4/01/16 → …

Project: Research-related fundingOther

Aging of materials
Ceramic membranes

New in-situ technique to gauge the mechanics of biofilms

Chew, Y. & Wenk, J.


Project: Research-related fundingInternational Relations Office Funding

Research Output 2004 2019

Air filter comprising polymer foam/adsorbent (e.g. zeolite)/antibacterial metal

Perera, S., Crittenden, B., Camus, O., Chew, Y-M. & G, R., Oct 2018, IPC No. PCT/GB2018/051018, Patent No. WO2018193249, 18 Apr 2017, Priority date 18 Apr 2017

Research output: Patent

fluid dynamics
in situ
1 Citations

A Single Tube Contactor for Testing Membrane Ozonation

Zoumpouli, G., Baker, R., Taylor, C., Chippendale, M., Smithers, C., Ho, S., Mattia, D., Chew, Y-M. & Wenk, J., 10 Oct 2018, In : Water. 10, 10, 14 p., 1416.

Research output: Contribution to journalArticle

Open Access

Coalescence of small bubbles with surfactants

Lu, J., Corvalan, C., Chew, Y-M. & Huang, J. Y., 3 Nov 2018, In : Chemical Engineering Science. 196, p. 493-500

Research output: Contribution to journalArticle


Dataset for "3D Printed composite membranes with enhanced anti-fouling behaviour”

Al-Shimmery, A. (Creator), Mattia, D. (Creator), Chew, Y. (Creator), Mazinani, S. (Creator), Ji, J. (Creator), University of Bath, 21 Dec 2018



Advanced Studies of Membrane Fouling: Investigation of Cake Fouling Using Fluid Dynamic Gauging

Author: Lewis, W., 5 Jan 2015

Supervisor: Chew, Y. (Supervisor) & Bird, M. (Supervisor)

Student thesis: Doctoral ThesisPhD


An investigation into the strength and thickness of biofouling deposits to optimise chemical, water and energy use in industrial process cleaning

Author: Peck, O., 26 Sep 2017

Supervisor: Chew, Y. (Supervisor), Bird, M. (Supervisor) & Bolhuis, A. (Advisor)

Student thesis: Doctoral ThesisPhD


Development And Computational Studies Of Multi-Channel Adsorbent Hollow Fibre For The Removal Of Volatile Organic Compounds

Author: Alsharif, A., 1 Jul 2017

Supervisor: Perera, S. (Supervisor), Chew, Y. (Supervisor) & Lukyanov, D. (Supervisor)

Student thesis: Doctoral ThesisPhD


Hygrothermal performance of Moso bamboo-based building material

Author: Huang, P., 25 May 2017

Supervisor: Chang, W. (Supervisor), Ansell, M. (Supervisor), Chew, Y. (Supervisor) & Shea, A. (Supervisor)

Student thesis: Doctoral ThesisPhD


The importance of hydrodynamics and mechanical action in fabric washing

Author: Douglas, J., 27 Jun 2017

Supervisor: Bird, M. (Supervisor) & Chew, Y. (Supervisor)

Student thesis: Doctoral ThesisPhD