Hello, I am using svFSIplus for some simulations, but the results have not stabilized in the first few cycles. Therefore, I want to continue the simulation. However, when I set Continue_previous_simulation to 1 (true), the simulation always stops at the first step after the start. I checked and foun...

Hello, I have recently been using ROMSimulations in SimVascular for one-dimensional simulations, but I encountered an error (ERROR1.PNG). My model is quite simple, and even when I set the boundary condition to a simple Resistance with a value of 0, it still results in another error (ERROR2.PNG). Wha...

Hello, When I use svFSIplus for 3D fluid simulation (relevant settings as follows, inlet flow as shown in Fig.1), an error occurs at step 133: terminate called after throwing an instance of 'std::runtime_error' what(): FSILS: unexpected behavior in FSILS (likely due to the ill-conditioned LHS matrix...

Hi Dave, Thank you very much for your answer and suggestion. This result is easier to understand and is closer to the 3D result. However, due to the significant difference in results caused by the properties of the two materials, how can I determine which material to use in which situation? The mate...

Hello, I used svOneDSolver to perform a basic one-dimensional simulation of a steady-state problem in a straight tube. I input a flow rate of 100 ml/s and ran it for 100 steps with a time step of 0.001s . In theory, a steady-state problem should reach the ideal result in just a few steps. However, t...

Hello, When I used svFSI to do a simple cylindrical model simulation, I input a steady flow (in mm/s) into the inlet (Area = 12.49mm^2), as shown below. But the flux in the result file B_NS_Velocity_flux is about 7.75. I am not sure what is the unit of flow here. Add BC: inlet { Type: Dir Time depen...

Hello, When I was learning to use svFSIplus, I was not very clear about the meaning of the data in the histor.dat . I couldn't find relevant explanations on the GitHub webpage provided. I would like to inquire about the meanings of these symbols and understand how to determine if the equation is con...

Hello, I downloaded the latest VTK 9.3.0 and compiled svFSIPlus in Ubuntu22.04, planning to use it for emulation. I started learning from the example and copied the generated executable file svFSI into the folder of the example. During the simulation, the following problems have always occurred. I h...

Hi Dave, I simulated the cerebral vascular system using svSolver and svFSI with the same grid consisting of 3.25 million cells on the Beijing Super Cloud Computing platform, utilizing 32 cores for testing. I estimated the simulation speed by comparing the times of the files generated by both (restar...

Hello, I have recently been studying fluid problems. Both svSolver and svFSI can be used in fluid problems. svFSI is more standardized in code writing, more widely used and maintained, which has attracted my attention. Consequently, I wanted to compare the results of svSolver and svFSI in terms of s...