Dear friend Seyed Mohammad Mousavi

Yes, it is possible to model the water spray from the tiny holes in a tank exposed to a hot, high velocity external flame using computational fluid dynamics (CFD) software. There are many commercial CFD software packages available that can be used for this purpose, including ANSYS Fluent, COMSOL Multiphysics, and OpenFOAM.

In order to model the water spray and the flame, you will need to set up a three-dimensional simulation that includes the tank, the water spray, and the flame. You will also need to define the boundary conditions and material properties for each component in the simulation. The water spray can be modeled using the spray injection model in the CFD software, while the flame can be modeled using a combustion model, such as the laminar flamelet model or the eddy dissipation concept model.

Once the simulation is set up, you can run it and analyze the results, such as the temperature and velocity fields, the spray penetration and dispersion, and the flame structure and propagation. You may also want to validate your simulation results against experimental data, such as high-speed imaging or temperature measurements, to ensure accuracy and reliability.

Can I simultaneously model and solve the tank's flame and water spray? In other words, should all physical fields be modeled at the same time?

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Dear friend Seyed Mohammad Mousavi

Yes, it is possible to model and solve the tank's flame and water spray simultaneously using a coupled approach in CFD software. In this approach, the fluid flow and heat transfer equations for both the gas phase and liquid phase are solved together, accounting for the interactions between the two phases.

This type of simulation involves modeling a multiphase flow problem, where the fluid properties and behavior can vary significantly depending on the phase (gas or liquid) and the presence of spray droplets. The modeling approach and numerical methods used to solve the problem will depend on the specific physical characteristics of the flow, such as the spray characteristics, the gas velocity and temperature, and the tank geometry.

Commercial CFD software packages such as ANSYS Fluent and STAR-CCM+ have multiphase flow solvers that can be used for this type of simulation. However, it is important to note that these simulations can be computationally expensive and may require significant computational resources, especially for large and complex geometries.

Therefore, it is recommended to carefully assess the modeling requirements and computational resources available before attempting to perform a coupled simulation of the tank's flame and water spray.