# Result Table - Open Pipe

The available results that are listed in the table vary depending upon the fluid phase state and upon the visible properties that you have selected. Figure 1 shows all of the available results for a liquid phase state. Figure 2 shows the normal or default rows. You can choose the rows you wish to display in the results table via the Set Visible Results Dialog. Figure 1: Available results for an open pipe Figure 2: Default result for an open pipe Only descriptions for the default results are shown in this section. If you wish to see the definition for other values click here. -- ID -- (aka User Number): All flowsheet elements have a unique number that is assigned by FluidFlow. It is not possible for the user to change this number because it is used as a unique identifier by the scripting module. Node numbering starts from 1, incrementing upwards, and pipe numbering starts from -1, decrementing downwards. Composition Mass %: This is the fluid mass composition that remains constant throughout the element. FluidFlow determines the composition because an individual component mass balance is carried out at each node. Element Type: The name FluidFlow uses to describe the element. Flow: This is the open pipe inlet flow that FluidFlow has calculated will be flowing. For all phase states the mass flow into and out of the open pipe will be identical. For incompressible fluids the pipe inlet and exit flows expressed in volumetric units will be identical, but this will not be the case if the temperature changes across the open pipe. For gas flows this represents the actual flow at the element inlet. For two phase flow of constant quality and temperature, volumetric flow will be identical, for changing quality or changing temperature volumetric inlet and outlet flows will be different. Flow at NTP: This is the volumetric flow referenced to normal conditions (0°C and 101325 Pa). NTP flow is the same as the gas flows through the element. NOTE: This result is available for Gas Calculations. Flow at STP: This is the volumetric flow referenced to standard conditions (15°C and 101325 Pa). STP flow is the same as the gas flows through the element. NOTE: This result is available for Gas Calculations. Friction Loss: This is the calculated total pressure loss due to friction. Heat Transferred: If the Heat Loss Model is not equal to "Ignore Heat Loss/Gain", then an additional row will appear in the results table showing the amount of heat that has been transferred. In Mach Number: This is the ratio of inlet velocity to the velocity of sound at the inlet conditions. It is not possible to reach a mach number greater than 1 within this element. The velocity of sound is a thermo physical property and depends on temperature and pressure. NOTE: This result is available for Gas Calculations. In Stagnation Pressure: The stagnation pressure at the element inlet. This is the sum of kinetic and pressure energies (static pressure + velocity pressure). Stagnation pressure is the pressure a flowing fluid would rise to if brought isentropically to rest, converting its kinetic energy to enthalpy. Stagnation pressure is a measure of the usefulness of the gas's energy. In Stag. Temperature: This is the stagnation temperature at the element inlet. The stagnation temperature is the temperature that the fluid would reach if it were brought to rest isentropically, converting its kinetic energy to enthalpy. In Static Pressure: This is the pressure that acts equally in all directions at the point in the fluid and is present irrespective if the fluid is flowing or if the fluid is at rest. The pressure inside any element is not the static pressure, unless there is no flow. Stagnation pressure is the flowing pressure. In Static Temperature: The static temperature at the element inlet. Static temperature is related to stagnation temperature (ignoring work, heat exchange, and potential energy) by the equation T 1 = T 1 0 - 0.5 v 1 2 / C p In Velocity: The velocity at the element inlet. For gases, velocity increases as the fluid moves across the element. This can also occur with two phase flow where flashing exists, or for an incompressible where the temperature rises. Velocity can also decrease as a fluid flows across an element, for example cooling of a liquid. Out Mach Number: This is the ratio of outlet velocity to the velocity of sound at the outlet conditions. It is not possible to reach a mach number greater than 1 within this element. The velocity of sound is a thermo physical property and depends on temperature and pressure. NOTE: This result is available for Gas Calculations. Out Stagnation Pressure: The stagnation pressure at the element outlet. This is the sum of kinetic and pressure energies (static pressure + velocity pressure). Stagnation pressure is the pressure a flowing fluid would rise to if brought isentropically to rest, converting its kinetic energy to enthalpy. Stagnation pressure is a measure of the usefulness of the gas's energy. Out Stag. Temperature: This is the stagnation temperature at the element outlet. The stagnation temperature is the temperature that the fluid would reach if it were brought to rest isentropically, converting its kinetic energy to enthalpy. Out Static Pressure: This is the pressure that acts equally in all directions at the point in the fluid and is present irrespective if the fluid is flowing or if the fluid is at rest. The pressure assumed at the outlet of an open pipe node is atmospheric and this relates to static pressure. Out Static Temperature: The static temperature at the element outlet. Static temperature is related to stagnation temperature (ignoring work, heat exchange, and potential energy) by the equation T 2 = T 2 0 - 0.5 v 2 2 / C p Out Velocity: The velocity at the element outlet. For gases, velocity increases as the fluid moves down the pipe. This can also occur with two phase flow where flashing exists, or for an incompressible where the temperature rises. Velocity can also decrease as a fluid flows down a pipe, for example cooling of a liquid. Stagnation Pressure Loss: This is the difference between the inlet and outlet stagnation pressures. Static Pressure Loss: This is the difference between the inlet and outlet static pressures.