Water infiltration into a porous concrete block, ANSYS Fluent Simulation Training
$180.00 Student Discount
- The problem numerically simulates Water infiltration into a porous concrete block using ANSYS Fluent software.
- We design the 3-D model by the Design Modeler software.
- We Mesh the model by ANSYS Meshing software, and the element number equals 623464.
- We perform this simulation as unsteady (Transient).
- We use the Porous medium to study water infiltration into a porous concrete block.
- We use the VOF Multi-Phase model to define two-phase flow inside a concrete block.
This simulation is about water infiltration into a porous concrete block via ANSYS Fluent software. We perform this CFD project and investigate it by CFD analysis.
In this modeling, a cube block is designed as a Porous medium. The water flow enters it from a circular section at the bottom of the block. After passing through the porous material, it leaves the upper section of the block.
The inlet water flow has a relative pressure of 5 bar or 500,000 pascals; Therefore, a pressure inlet boundary condition is used at the block input. It is also assumed that only air inside the block is in the initial state, and water flow penetrates it.
The present work investigates the amount of water infiltration into this porous block over time. Therefore, the current problem is solved as unsteady and time-dependent.
The geometry of the present model is drawn by Design Modeler software. This model consists of a cubic block with a side of 0.15 with a circular inlet for flow entry in the bottom with a diameter of 0.07 m.
The model is then meshed by ANSYS Meshing software. The model mesh is structured, and 421875 Hex cells have been created.
In this simulation, the Porous option is used in the cell zone conditions. The porous medium defined in the block has a porosity coefficient equal to 0.01; This means that the ratio of empty space to the block’s total volume is equal to 0.01.
It is also assumed that only air inside the block is in the initial state, and water flow penetrates it. Therefore, the Multiphase Model is used to define a two-phase flow consisting of water and air.
The two-phase VOF (volume of fluid) model is used in this simulation to define air as the primary and water as the secondary phase. Since the phase separation boundary is completely distinct, the Volume of Fluid (VOF) model is used. The sharp type in interface modeling has been used to determine the behavior at the boundary between two phases.
After simulation, two-dimensional and three-dimensional contours of pressure and water and air volume fraction are obtained. These contours were obtained at different times in a time interval of 0.2 s.
It can be seen from the figures that over time, the infiltration rate of water flow inside the block increases. It is also observed that the water flow decreases with pressure by moving inside the porous block due to a porous medium’s effects.