Source_Code

/*Pressure Drop Across A Valve Source Code
This is the source code for calculating the pressure drop across a valve by interacting with the user.
The program is to be written where an engineer can select the type of valve being dealt with, input the needed information, 
and a theoretical pressure drop across that valve will be calculated. 

The second part of this program will ask the engineer what the recorded pressure drop is,
and will provide a %error. 
*/

//Importing Scanner Utility
import java.util.Scanner;

public class deltaPValve
{
	public static void main(String[] args)
	{
		//Variable List
		double flowrate;
		double diameter;
		double velocity;
		double viscosity;
		double ReynoldsNumber;
		double density;
		
		//Importing keyboard scanner
		Scanner keyboard = new Scanner (System.in);
		
		//Greeting Statement 
		System.out.println("\nThis program allows you to calculate a theoretical pressure drop across a valve.\n");
		System.out.print("Currently, it can calculate a pressure drop across the following valves: \n 	Gate Valve \n 	Globe Valve \n 	Ball Valve \n 	Expansion Valve \n");
		
		//Display of required information
		System.out.println("\nIn order to get started, you are going to need the following information:");
		System.out.print("	The flowrate in GPM \n 	The density of the fluid in kg/m^3 \n 	The viscosity of the fluid in cP at the operating temperature \n 	The inner diameter of the pipe");
		
		//Request for User Data
		System.out.println("\nEnter the flowrate in GPM: ");
		flowrate = keyboard.nextDouble();
		
		System.out.println("Enter the inner diameter of the pipe in inches: ");
		diameter = keyboard.nextDouble();
		
		System.out.println("Enter the fluid viscosity (in cP) at the operating temperature: ");
		viscosity = keyboard.nextDouble();
		
		System.out.println("Enter the density of the fluid in kilograms per cubic meter: ");
		density = keyboard.nextDouble();
		
		//Performing unit conversions from user input units to metric units 
		double diameterSI = diameter*0.254;
		double flowrateSI = flowrate*0.0378541/60;
		double viscositySI = viscosity/1000;
		
		//Calculating the velocity inside of the pipe at the given flowrate and diameter
		velocity= (4*flowrateSI)/(3.14*diameterSI*diameterSI);
		System.out.printf("The velocity of water in a %.2f inch pipe at %.2f GPM is %.2f m/s",diameter,flowrate,velocity);
		
		//Calculating the Reynolds number 
		ReynoldsNumber = (density*velocity*diameterSI)/viscositySI;
		System.out.printf("\nThis gives a Reynolds number of %.2f.",ReynoldsNumber);
		
		//Deciding if the Reynolds Number is turbulent
		{if (ReynoldsNumber > 10000)
		
			System.out.println("\nSince the Reynolds Number is above 10,000, the flow is turbulent");
		else
			System.out.println("\nThe flow is laminar. This is a suspect result and you should double check your input data.");
		}
		
		//Calculating the friction factor
	}
}