Dear all:
In my model for fluid flow in porous media, I want to set gas pressure as boundary condition at one end of the soil specimen. In the experiment, the gas pressure is applied on the specimen by compressing a certain amount of gas, just like a syringe. At the same time the gas will flow through the specimen following Darcy's law.
According to the condition, I derived a differential equation to solve the gas pressure, but I have no ideas how to applied it on the specimen in Comsol. The equation is like: d(PV)=APv, where P is the gas pressure, V is the gas volume, A is the area of the cross-section of the specimen, v is the Darcy's velocity, which is v=k*grad(P). This seems complicated to apply it on the boundary. If you have any ideas or any experience about such a problem, could you please share them with me? I really appreciate your assistance and time.
Thank you!
In my model for fluid flow in porous media, I want to set gas pressure as boundary condition at one end of the soil specimen. In the experiment, the gas pressure is applied on the specimen by compressing a certain amount of gas, just like a syringe. At the same time the gas will flow through the specimen following Darcy's law.
According to the condition, I derived a differential equation to solve the gas pressure, but I have no ideas how to applied it on the specimen in Comsol. The equation is like: d(PV)=APv, where P is the gas pressure, V is the gas volume, A is the area of the cross-section of the specimen, v is the Darcy's velocity, which is v=k*grad(P). This seems complicated to apply it on the boundary. If you have any ideas or any experience about such a problem, could you please share them with me? I really appreciate your assistance and time.
Thank you!