Hello everyone,
I am trying to set up a DC-FCI scenario of external flow on a cone geometry using optistruct and acusolve. I have run the relevant tutorial from altair documentation regarding a piezoelectric energy harvester and I moved on to set up my own model, unfortunately without success. Upon input of the first time step, the analysis is terminated with the following error:
acuSolve: Time-Step= 1 ; timeInc= 5.000000e-03 ; time= 0.000000e+00
acuSolve: *** ASSERTION in Function <iopWriteSock> File <iopSocket.c> Line <612>
acuSolve: *** TCP socket write error; Permission denied
acuRun: *** ERROR: error occurred executing acuSolve"
I am convinced that this error does not have to do with the time step set up, I have chosen the same time step in the NLPARM and fluid setup as indicated in the documentation, and I have defined the same end time in both solvers. In the tutorial I encountered no such issue which makes me think that the error arises because of the boundary conditions and motion setups in the two models, but the error type does not guide me towards the specific problem. I have tried changing the BCs in various ways I consider indicative of the scenario, but the error remains the same.
More specifically, in the optistruct model, I use an SPC to fix the root of the cylinder and define in the surf set the entire exterior of the cone for the interaction area between the solvers. In acusolve I define inlet and outlets in the respective areas of the control volume and slip BCs for the rest of the sides of the control volume. Regarding the cone, I identify as external surface the entire area of the cone, and no-constrains on the surfaces of the cone except the root that is fixed in the optistruct setup.
Does anyone have any suggestions on what could be causing this problem and the rationale behind suggested solutions (if any)?
I am also attaching the hm files for both optistruct and acusolve, the .fem and .log files cci.txt and .out for convenience.
P.S. I am aware that mesh is not good enough to produce acurate results, sole purpose of this model is to understand the setup of such a sim and have a model that can run on a small personal computer easily.
Thanks in advance.