TankHoleSeries Commands

4 models that start with TankHole (TankHole, TankHoleInitRate, TankHoleDuration, TankHoleFixStep) models Liquids outflow from a hole in the body of the tank with small changes to each other. TankHole models the outflow until the outflow volume become equal to the Tank containment volume, TankHoleInitRate is same TankHole model with outflow rate equal to the initial rate, TankHoleDuration is same Tankhole model but its calculations will be stop when the release duration become equal to defined duration and TankHoleFixStep is same TankHole but with limited steps of calculations. Models are according [Ref.1].

OutFlowModel.TankHole(Tag, Hole_Diameter=0.01, Hole_Height_FromBot=0, delta_t=0.1, Cd=1)

Argument	Type	Description
Tag	int	Unique integer value that will be used for referring to the defined elements or objects.
Hole_Diameter	float	Diameter of the hole that liquid release.
Hole_Height_FromBot	float	the height of the hole from the ground.
delta_t	float	Calculation steps time interval.
Cd	float	Discharge coefficient ≤1.

Example:

Python Code

import opensrane as opr

opr.OutFlowModel.TankHole(Tag, Hole_Diameter=0.05, Hole_Height_FromBot=0, delta_t=500, Cd=1)

OutFlowModel.TankHoleInitRate(Tag, Hole_Diameter=0.01, Hole_Height_FromBot=0, delta_t=0.1, Cd=1)

In this model the initial rate of outflow will be consider constant.

Argument	Type	Description
		Parameters are same as before.

Example:

Python Code

import opensrane as opr

opr.OutFlowModel.TankHoleInitRate(2, Hole_Diameter=0.01, Hole_Height_FromBot=1, delta_t=500, Cd=0.62)

OutFlowModel.TankHoleDuration(Tag, Hole_Diameter=0.01, Hole_Height_FromBot=0, delta_t=0.1, Cd=1, Duration=100)

In this model the duration of outflow is limited to defined Duration.

Argument	Type	Description
Duration	float	Total duration of outflow
		Other parameters are same as before.

Example:

Python Code

import opensrane as opr

opr.OutFlowModel.TankHoleDuration(3, Hole_Diameter=0.5, Hole_Height_FromBot=0.5, delta_t=500, Cd=0.62,Duration=3000)

OutFlowModel.TankHoleFixStep(Tag, Hole_Diameter=0.01, Hole_Height_FromBot=0, delta_t=0.1, Cd=1, StepNumber=30)

In this model the calculations steps are limited to the defined StepNumber.

Argument	Type	Description
StepNumber	int	The number or calculations steps.
		Other parameters are same as before.

Example:

Python Code

import opensrane as opr

opr.OutFlowModel.TankHoleFixStep(4, Hole_Diameter=0.5, Hole_Height_FromBot=0.5, delta_t=500, Cd=0.62,StepNumber=30)

[Ref.1]

J. Casal, Evaluation of the Effects and Consequences of Major Accidents in Industrial Plants, vol. 8. 2018.

Code Developed by: Bijan Sayyafzadeh