actually use precision argument

bfps/NavierStokes.py

@@ -998,7 +998,9 @@ class NavierStokes(_fluid_particle_base):
             meantrS2 = (opt.n//2 / opt.kMeta)**4 * self.parameters['nu']**2
             self.parameters['max_Q_estimate'] = meantrS2
             self.parameters['max_R_estimate'] = .4*meantrS2**1.5
-            self.name += 'QR'
+            # add QR suffix to code name, since we now expect additional
+            # datasets in the .h5 file
+            self.name += '-QR'
         if len(opt.src_work_dir) == 0:
             opt.src_work_dir = opt.work_dir
         self.pars_from_namespace(opt)

bfps/__main__.py

@@ -47,7 +47,7 @@ def main():
     opt = parser.parse_args(sys.argv[1:2])
     # error is thrown if first option is not a base class, so launch
     # cannot be executed by mistake.
-    c = eval('{0}()'.format(opt.base_class))
+    c = eval('{0}(fluid_precision = {1})'.format(opt.base_class, opt.precision))
     c.launch(args = sys.argv[2:])
     return None