Palabos on Yu Vision

Advection-diffusion Problem

Fri, 28 Aug 2020 00:00:00 +0000

Advection-diffusion problems are common in nature. They include mixing of and heat diffusion in fluids.

3D Dam Break

Wed, 26 Aug 2020 00:00:00 +0000

The breaking dam free surface problem. This code demonstrates the basic usage of the free surface module in Palabos.

Phase Separation

Sun, 23 Aug 2020 00:00:00 +0000

To simulate multiphase fluids, we need long range interactions between fluid ‘particles’.

Shan-Chen Model

For our purposes interactions with nearest neighbor particle densities f will be sufficient to simulate the basic phenomena of multiphase fluid interactions. For single component multiphase fluids (e.g., water/water vapor) an attractive (cohesive) force F between nearest neighbor fluid particles is needed and, for the D2Q9 model, is induced as follows: $$ \boldsymbol{F}(\boldsymbol{x},t)=-G\Psi(\boldsymbol{x},t)\sum_{a=1}^{8}w_a\psi(\boldsymbol{x+e_a}\Delta t,t)\boldsymbol{e_a} $$

where G is the interaction strength, w_a is 1/9 for a={1, 2, 3, 4}, is 1/36 for a={5, 6, 7, 8}, and psi (Greek letter) is the interaction potential:

3D CBC

Wed, 05 Aug 2020 00:00:00 +0000

The goal of this exercise is to familiarize with off-lattice boundary conditions (3D Curved Boundary Conditions) in Palabos

2D CBC

Mon, 03 Aug 2020 00:00:00 +0000

The goal of this exercise is to familiarize with off-lattice boundary conditions (2D Curved Boundary Conditions) in Palabos

Unit Conversion

Sat, 01 Aug 2020 00:00:00 +0000

The unit conversion is an important part between the Lattice Unit and Physical Unit.

Cavity2d

Fri, 31 Jul 2020 00:00:00 +0000

For a while, I used the old version of Palabos software.