# Result Table - Cyclone

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 gas 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 a cyclone. 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. Flow: This is the flow that FluidFlow has calculated will be flowing into the cyclone. For all phase states the mass flow into and out of the cyclone will be identical. For incompressible fluids the inlet and exit flows expressed in volumetric units will be identical, but this will not be the case if the temperature changes across the cyclone. 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. 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. 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. In Stagnation Pressure: The stagnation pressure at the cyclone 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. In Stag. Temperature: This is the stagnation temperature at the cyclone 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: The static pressure at the element inlet. 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 a cyclone is not the static pressure, unless there is no flow. In Static Temperature: The static temperature at the cyclone 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 cyclone 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. Joule–Thomson Coefficient: The Joule–Thomson effect describes the increase or decrease in the temperature of a gas when allowed to expand. The change in temperature (T) with a decrease of pressure (P) at constant enthalpy (H) is referred to as the Joule–Thomson coefficient (μJT). FluidFlow uses the Peng Robinson EOS to evaluate the Joule–Thomson coefficient which is expressed as: μ JT = (∂T/∂P)H The value of μJT is typically expressed in °C/bar and is dependent on the physical properties of the gas, as well as the temperature and pressure of the gas before expansion. 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. Out Stagnation Pressure: The stagnation pressure at the cyclone 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. Out Stag. Temperature: This is the stagnation temperature at the cyclone 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: The static pressure at the element outlet. 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 a cyclone is not the static pressure, unless there is no flow. Out Static Temperature: The static temperature at the cyclone 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 cyclone outlet. For gases, velocity increases as the fluid flows across the element. This can also occur with two phase flow where flashing exists, or for an incompressible fluid where the temperature rises. Velocity can also decrease, for example cooling of a liquid. Total Pressure Loss: This is the calculated total pressure loss. Total pressure loss is not always the same as frictional loss, for example, when a temperature or velocity change occurs. In FluidFlow total pressure loss is defined (from the Energy Equation) as Δ P = (z 1 ρ 1 g + p 1 + 0.5 ρ 1 v 1 2) - (z 2 ρ 2 g + p 2 + 0.5 ρ 2 v 2 2)