Python version of Palabos compilation error (no replies)
Hi all, I'm trying to use pythonic palabos on my Mac. However, I got many errors that I could deal with except the following error: "vtable for plb::BoundedReductiveBoxProcessingFunctional3D",...
View ArticlePost processing of dambreak test case (no replies)
Hi! This is regarding the dambreak 3d test case available in show cases example. I tried the test case for the following parameters using 40 processors but couldn't get the droplets as the rendered...
View ArticleSimulating free surface flow with momentum source (no replies)
Hi I want to simulate a fluid initially at rest in a closed container and now moving due to an external momentum source applied on the container. I have tried the same in OpenFOAM by applying a...
View ArticleBoundary for MultiGridLattice (no replies)
Hi, I'm trying the MultiGridLattice2D learning from the gridRefinement2d dipole case. I created the 3 level lattice2D and want to set different boundary for different edge, but it does not success. It...
View ArticleFree-surface boundary conditions (no replies)
Hi there! I'm fairly new to Palabos and LBM and have run into issues with the boundary conditions of my free-surface simulation.. Is there any legitimate way to set boundary conditions (on or off...
View ArticleUnion of multiple areas for grid refinement (no replies)
Hi, I'm working on the multigrid refinement cases. I want to create two refinement areas, and they have coincidence parts. How shall I deal with this situation? I tried to create two Box3D which are...
View ArticlePressure probes in palabos (no replies)
Hi! I am running the dambreak3d show case and want to plot pressure v/s time curve at a set of particular points (I have the physical coordinates of the points). Is it possible to introduce pressure...
View ArticleModel developed through stl file (1 reply)
Hi all, I build a model through a stl file, but the simulation results are out of my expect and the average energy shown in terminal is nan or -nan. I just wonder what it means. Does that mean the...
View ArticleInlet outlet boundary condition in palabos (no replies)
Hi! I am trying to add a crossflow in the falling droplet showcase. Any suggestions regarding how I can add it? I was trying to follow the externalFlowAroundObstance show case but it is very difficult...
View ArticleCoupling Palabos to an external module (Phreeqc) (no replies)
Hi, I'm working on a reactive transport problem in porous media and wondering if it is possible to couple Palabos to an external reaction module, Phreeqc, in every time step. To be specific, what I...
View ArticleStarting generalExternalFlow in Codeblocks (no replies)
Hi, I am not experienced using Palabos. I was trying to run the show case "generalExternalFlow" in Code::blocks for windows. The code builts without problems but when running it, it crashes...
View ArticleNon-Reflecting Boundary Conditions (NRBC) (2 replies)
Hi there, I am running the showcases of cylinder in 2D flow with the velocity BC around inlet, up and down; and outflow (zero-gradient of all velocity components) BC at the outlet. As all these boxes...
View ArticleImported geometry beyond bounds and local boundary conditions (no replies)
Hello everyone, I was trying to understand how external geometry can be used as an input on Palabos and I was using the externalFlowAroundObstacle as a starting point for this. I wanted to simulate a...
View ArticleRayleigh Taylor Instability (2D) using Multicomponent2D shan chen model (no...
Hi! I am trying to validate the multicomponent2D- rayleigh taylor code given in palabos show cases using this paper. There are several queries that I have regarding this: 1. The paper mentions:...
View ArticleHow to use the class "computeDensity"? (no replies)
Hi all, I've tried to use the following line of code but it didn't compile. lattice.get(someX,someY,someZ).computeDensity(someVariable) What I'm trying to do with the above code is accessing the cell...
View ArticleBoundary conditions and dimensions on voxelized domain (no replies)
Hi all, I'm having trouble imposing boundary conditions on a voxelized domain similar to the aneurysm example. In that example a velocity inlet boundary condition is used, while in the other two...
View ArticleInitializing fluid inside a domain in Palabos (no replies)
Hi! I am trying to modify the aneurysm show case to run a sloshing simulation in a tank (I have the STL file). I started off by removing the inlet outlet parts of the code, since the tank won't have...
View Article[Solved] Non-local data processor (4 replies)
Hi everyone, I am interested in implementing some simple spatial filters and trying to write a functional for it. I am now facing some problems and was wondering if anyone has any idea about it: - As...
View ArticleIssues with compiling Palabos in Mac OS Sierra (no replies)
Hello all, I trying to compile the tutorial_2 on a macOS, but I have a issue. My mac has phyton3.x and the Palabos uses previous phyton versions to compile. The error is "scons: *** SCons version...
View Articleboundarycondition in inlet and outlet (no replies)
Hi,there! Now,I am in trouble of the use of pressureboundarycondition. I am modeling a flow with const velocity.In a box, there is one inlet, one outlet and four sidewall. About the boundarycondition,...
View Articlepressureboundarycondition (no replies)
Hi,there! If you have exprerince in using pressureboundarycondition3D,I need your help. When I set const pressure value to one side of a box,and other side were set to freeslip .there will be velocity...
View ArticleMicrochannel with a pressure gradient at Palabos (no replies)
Dear all, I am a PhD student in mechanical engineering, working on a problem that requires a microchannel flow field. In these problems, compressibility effects are present even at low speeds. In such...
View ArticleOpen surface boundary in stl (no replies)
Hi there: I see the aneuyrsm example, the boundary is closed. Now I want to achieve an example ,in which the boundary is open ,like a surface that is at an angle to the horizontal plane, and I can...
View ArticleCalculate the amount of memory used (no replies)
Hello, I am running the simulation to compute the permeability of a 3D Porous Medium. My sample dimensions are 1232x1197x1197. It seems that it is using a considerable amount of memory as the job...
View ArticleThe index of a specific component of a symmetric tensor (no replies)
In the Palabos user guide, I find the sentence "To know the index of a specific component, use a notation like SymmetricTensorImpl<T,3>::xz for the the xy-component of a 3D symmetric tensor"....
View ArticleNeed help on writing a data processor spits out a std::vector (no replies)
Hi all, It seems like I posted the same topic in a wrong place. Please pardon me leaving the same notes. The following is the post I made in LBM:algorithms section. I don't know if the forum is no...
View ArticleBounce back on multigrid? (no replies)
Greetings, community! I am dipping my toes at multigrid modeling, and I am currently doing some exploration on the technique to understand it enough to model my problem. My goal is, at the end, to...
View ArticleGradient of a scalar field (1 reply)
Is there an function/class that computes the gradient of a scalar field and the divergence of a vector field. For example, if a extract the density from the MultiBlockLattice3D using computeRho() and...
View ArticleValues for force on object too big (no replies)
Hi everybody, I'm trying to compute the resistance on an object (a ship) with Palabos. I based my code on the OffLatticeExternalFlow, in the case of the Mutligrid3D. Everything works quite fine, the...
View ArticleFree surface for OffLatticeExternalFlow (no replies)
Hallo Community, I'm trying (without success..) to implement a free surface for an external flow with 3D Multigrid. I have a classical Inlet/Outlet Domain with a constant inlet-velocity /...
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