Georg_Brantegger/Python-DT_Slot_3
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corrected steady state pressure to work properly

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Georg ´Brantegger
2022-07-28 11:36:39 +02:00
parent 03ff67e0ad
commit 9df448663e
2 changed files with 52 additions and 47 deletions
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17
Ausgleichsbecken/Ausgleichsbecken_class_file.py
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@@ -9,19 +9,19 @@ parent = os.path.dirname(current)
sys.path.append(parent)
from functions.pressure_conversion import pressure_conversion
def FODE_function(x,h,A,A_a,p,rho,g):
def FODE_function(x_out,h,A,A_a,p,rho,g):
# (FODE ... first order differential equation)
# based on the outflux formula by Andreas Malcherek
# https://www.youtube.com/watch?v=8HO2LwqOhqQ
# adapted for a pressurized pipeline into which the reservoir effuses
# and flow direction
# x ... effusion velocity
# x_out ... effusion velocity
# h ... level in the reservoir
# A_a ... Outflux_Area
# A ... Reservoir_Area
# g ... gravitational acceleration
# rho ... density of the liquid in the reservoir
f = x*abs(x)/h*(A_a/A-1.)+g-p/(rho*h)
f = x_out*abs(x_out)/h*(A_a/A-1.)+g-p/(rho*h)
return f
@@ -101,8 +101,10 @@ class Ausgleichsbecken_class:
def set_steady_state(self,ss_influx,ss_level,display_pressure_unit):
# set the steady state (ss) condition in which the net flux is zero
# set pressure acting on the outflux area so that the level stays constant
ss_outflux = ss_influx
ss_pressure = self.density*self.g*ss_level-(ss_outflux/self.area_outflux)**2*self.density/2
ss_outflux = ss_influx
ss_influx_vel = ss_influx/self.area
ss_outflux_vel = ss_outflux/self.area_outflux
ss_pressure = self.density*self.g*ss_level+self.density*ss_outflux_vel*(ss_influx_vel-ss_outflux_vel)
self.set_influx(ss_influx)
self.set_initial_level(ss_level)
@@ -181,7 +183,10 @@ class Ausgleichsbecken_class:
return self.level*self.area
def update_pressure(self):
p_new = self.density*self.g*self.level-(self.outflux/self.area_outflux)**2*self.density/2
influx_vel = self.influx/self.area
outflux_vel = self.outflux/self.area_outflux
p_new = self.density*self.g*self.level+self.density*outflux_vel*(influx_vel-outflux_vel)
return p_new
def timestep_reservoir_evolution(self):