[FLASH-USERS] Two sedov explosions

[Suoqing Ji]

Hi Ian,

The easiest way I can come up with is to take advantage of the subroutine Simulation_adjustEvolution.F90.

In your Simulation_initBlock, you can initialize the first explosion only. And then in Simulation_adjustEvolution, you set a trigger to start the second explosion (say, when simtime >= 2nd_explosion_time and 2nd_exploded = .false., trigger the second explosion, and then mark the flag “2nd_exploded” as .true. to make sure it’s triggered only once).

Hope this will do it!

Best wishes,
—
Suoqing Ji
Department of Physics
University of California, Santa Barbara
http://physics.ucsb.edu/~suoqing <http://physics.ucsb.edu/~suoqing>

> On Jun 11, 2018, at 2:16 PM, Ian Padilla <ia6400pa-s at student.lu.se> wrote:
> 
> Dear all,
> 
> I’m working on two identical Sedov explosions centered at x=0.3 and x=0.8, respectively, in a [1,1,1] domain box.  I’d like one of them to start later than the other and I’m looking for advise on how to delay the evolution of one of them.
> 
> Here what I’ve done so far:
> 
> I have set Simulation_initBlock to initialize both explosions. Naively one can “pause” the evolution of BOTH explosions by writing an if-stament in Driver_evolveFlash: 
> 
> 	if( (dr_simTime .ge. 0.0 .and. dr_simTime < 0.01) .or. (dr_simTime .ge. 0.05) ) then 
> 		 call Timers_start("Hydro”) 
> 		 call Hydro(blockCount, blockList, 
> 			 & dr_simTime, dr_dt, dr_dtOld, sweepDummy) 
> 		 call Timers_stop("Hydro”) 
> 		 call Driver_driftUnk(__FILE__,__LINE__,driftUnk_flags) 
> 	 end if
> 
> Since I’d like to stop the evolution of only ONE explosion (please correct me if I’m mistaken) one solution is to identify (inside Driver_evolveFlash) the blocks with center < 0.5 (using Grid_getBlkCenterCoords(blockId, blockCenter)) and remove them from the blockList array that then is passed to Hydro sequence, so that only blocks belonging to the explosion at x = 0.8 get updated in the hydro unit.
> 
> I’m not sure this is the best way of doing it. I'd be very grateful if you had any tips on this.
> 
> Thanks in advance,
> 
> Ian Padilla
> Lund University
> 

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