View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001842 | OpenFOAM | Bug | public | 2015-09-01 22:04 | 2015-09-02 14:43 |
| Reporter | Assigned To | wyldckat | |||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | closed | Resolution | unable to reproduce | ||
| Platform | GNU/Linux | OS | OpenSuSE | OS Version | 13.1 |
| Summary | 0001842: questions on twoPhaseEulerFoam | ||||
| Description | 1 single phase flow I used the solver to simulate single phase flow and set the dispersed phase zero. I set the flow of air at ambient conditions between two parallel plates, at a distance of 0.07 m (L = 1 m). The air is fed at the inlet of the channel, where the velocity of 0.01 m/s is specified, and a Neumann boundary condition is used for the pressure. The outlet boundary condition imposes the value of the pressure, set to atmospheric, and assumes zero gradients for the velocity. The no-slip boundary condition was imposed at walls.(details referred to "implementation of an iterative solution procedure for multi-fluid gas-particle flow models on unstructured grids, Power Technology 213 (2011) p174-187") when I choose the model laminar, I found that the outlet velocity of air is similar to the turbulent results, not equal to the theory results of U=Umax*(1-(r/R)^2). I do not know the reason. 2 falling particles Referred to the same article by Passalacqua and Fox. The case describes the falling particles under effect of gravity. The case was always divergent if I chose kinetic theory for particles. I am not sure about my results. So I want to make sure whether it is right or not. | ||||
| Additional Information | the second case is The diameter of the duct is 0.05 m, and its height is 0.2 m. The pipe contains air, and a rectangular block of particles (ρs= 2000 kg/m 3, dp = 4.0× 10− 4 m) with a volume fraction equal to 0.58 is inserted at the top, near the outlet. The sides and the bottom of the column are treated with the no-slip boundary condition for the fluid phase, and with the slip condition for the dispersed phase. The top boundary sets the dispersed phase fraction to zero, in order to allow only the gas-phase to re-enter the domain if there is recirculation. Pressure is set to the atmospheric at the outlet, where Neumann conditions are used for all the other variables. A grid density of 10 × 40 cells was used. | ||||
| Tags | No tags attached. | ||||
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Greetings paulpu, For better or for worse, this is the bug tracker for the OpenFOAM project, i.e. it's meant to be used for reporting bugs, detail how to reproduce those bugs and discuss how to solve the bugs. Nonetheless, "feature requests" are also contemplated in the bug tracker, since it can be considered from a particular point of view that if a feature is missing, then it's a bug. The report you've made does not provide enough information for considering this a bug report nor a feature request. It completely looks like a request for user support, for which this bug tracker was not designed for. Therefore, this report will be closed. If you require support, please use any of the available support possibilities that exist for OpenFOAM, such as the public support given in forums or contact directly a company that explicitly provides user support. Best regards, Bruno |
