[JuPa]

I've read a paper which says that a transient simulation took 6 months to complete using a time step size of at least 1e-6 s on a standard quad core desktop machine (Intel i7 or equivalent).

My colleague argues that any acceleration by parallelisation in transient simulations are not possible.

I'm not sure I agree except for the fact that the minimum time a transient simulation will take is the total run time specified. I.e. if you ask CFX to solve a transient simulation for 10 hours, then it will take a minimum of 10 hours to compute using a time step of 1 hour. This assumes it takes 1 hour to compute the data in a 1 hour time step! All very confusing.

I understand there will be bottlenecks. I.e. if you compute your simulation using 100 nodes then the speed of the information transferred between those nodes may be the bottleneck.

The point of this thread/debate is this: do you foresee any issues with computing a transient simulation using parallel computing?