Modeling of multiphase flows and volume of fluids with various control phases has gained profound interest in the field of aviation sectors. In addition, computational fluid dynamics (CFD) played a great role in various other fields from mechanical to biomedical. CFD can be applied to a large variety of thermal industries such as power generation, nuclear reactors, chemical processes, and aero-related propulsion applications. CFD tools can be utilized to develop the models and predict the behavior of different phases of flow and the phenomena that they manifest.

However, developing the optimum multiphase model is challenging due to the lack of a unique set of equations and assumptions made while simulating each situation. Typically, multiphase flow is a non-equilibrium process depending on the continuum mechanics-based equations like continuity, energy, and momentum. Nevertheless, the allocation of the memory for solving the CFD problems is challenging for unsteady transient problems.

This Special Issue encourages submissions from researchers, eminent scientists, academia, and policymakers in the area of numerical modeling and simulation of multiphase phase fluids and their application in various sectors. We welcome original research and review articles.

Potential topics include but are not limited to the following:

• Aerodynamic force reduction effects in complex isothermal flows
• Modeling of flow profiles and interfacial phenomena
• Multiphase flow through open channel and closed confluence
• Boundary conditions for multiphase CFD predictions and application of various techniques including Dirichlet boundary conditions and lattice Boltzmann method
• Dirichlet boundary conditions for wall-bounded turbulent flows
• Boundary perturbations and Helmholtz equation
• Turbulent flows under different turbulence numerical modeling
• Mixing of multi-phase flow in a bioreactor
• Artificial neural network modeling and machine learning approaches on two-phase flow
• Boundary conversion techniques: Dirichlet-to-Neumann boundary conditions
• Meshing strategies: moving mesh and regeneration concepts
• Microscale and macroscale hydrodynamics
• High-speed incompressible flow under thermal gradient