A5063678780- Pickering emulsions and particle stabilization
- Characterization and Applications of Magnetic Nanoparticles
- Lattice Boltzmann Simulation Studies
University of Oxford
2023-2025
We consider the propagation of a bubble in non-uniform Hele-Shaw flow. focus on distinguished limit which is approximately circular plan view and its velocity determined by net force balance incorporating viscous pressure drag due to thin films separating from cell walls. find that instantaneous same as for uniform flow given background fluid evaluated at centre. apply model common microfluidic components, such T-junction injection sources sinks. Using methodology, we derive approximate...
We consider the propagation of inviscid bubbles in a Hele-Shaw cell under uniform background flow. focus on distinguished limit which hydrodynamic pressure gradient due to external flow balances viscous drag effects thin liquid films between and walls (Bretherton, J. Fluid Mech. , vol. 10, issue 2, 1961, pp. 166–188), with ratio these two measured by single dimensionless parameter that we label $\delta$ . In this regime, find each bubble remains approximately circular, its velocity is...
We theoretically and experimentally study the propagation of a bubble in Hele-Shaw cell under uniform background flow at low Reynolds number. consider situations where both capillary number Ca ratio ε height to diameter are small. The is then flattened into pancake-like shape, with an approximately circular profile when viewed from above, thin liquid films lie between walls. Bubble motion deformation determined by interplay viscous pressure, pressure drop due films, in-plane curvature...