We consider the microscale fluid-structure interactions (mFSI) from different fields such as particle focusing in microchannels from microfluidics, deformable objects suspending in micro-swimmer suspensions from micro...
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We consider the microscale fluid-structure interactions (mFSI) from different fields such as particle focusing in microchannels from microfluidics, deformable objects suspending in micro-swimmer suspensions from microbiology, and two-phase flows on solid surfaces from various contexts, e.g., microscale manufacturing, and geophysics, etc. For this purpose, we propose and validate a generic monolithic direct numerical simulation (DNS) approach--Diffuse-Resistance-Domain (DRD) approach for mFSI in multicomponent multiphase flows. This approach overcomes major challenges of simulating mFSI where we use diffuse-interface models for fluid-fluid interfaces and apply fluid-solid interfacial conditions via smooth interpolations of dynamic-resistance coefficients across interfaces. Some interesting applications in microfluidics,active matter, and porous media flows are presented as examples. The DRD approach is extensible and reusable, making it suitable for simulating complex mFSI involving multi-physics multi-field couplings. This generic DNS approach offers a promising tool for understanding physical mechanisms, controlling microscale fluids, and optimizing engineering processes in areas like microfluidics, additive manufacturing, and biomedical engineering.
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