This is because air may be drawn in where the is no place to add a filter. It is also more difficult to add filters to the intake areas of the case that specifically draw air in through them exclusively. While it is an effective way to cool your system, it can quite often result in more dust being pulled into your case over time. Side note: The same points listed here can be applied to any fan configuration when comparing airflow rates.
![solidworks flow simulation negative pressure warning solidworks flow simulation negative pressure warning](https://www.simscale.com/api/v1/projects/Ali_Arafat/centrifugal_pump_with_mrf/18fd93ac-7801-4a58-a6da-9b07d22c24e9/cugthumbnail/incompressible-flow-run-2-incompressible.png)
This pressure is not one of the boundary pressure input options, but it is a goal that can be tracked as an output. It is one of the terms of Bernoulli’s equation, which is an equation of energy conservation for a flow field in motion. It is closely related to the kinetic energy of a single fluid particle in the flow field. P is the density of the fluid, g is the local acceleration due to gravity, and z is the height of the stagnant flow field.ĭynamic pressure is equal to the difference between Static and Total Pressure. The Total Pressure can be mathematically obtained in fluid dynamics by summing the Static Pressure, Dynamic Pressure, and the Gravitational Head, as expressed by Bernoulli’s principle. The fluid can move into the tube but since there is no outlet, it stagnates and in this resting condition the pressure is measured to give the Total Pressure. The measurement tube for Total Pressure is an impact tube that is pointing directly into the flow field as in the example below. Total Pressure is the pressure of the fluid flow that is not moving but is at rest. Static Pressure can be measured as the flow passes over a device that introduces no velocity change to the flow or a device moving with the flow field.Īn example of this is a measuring device inside of an open tube parallel to the fluid flow, shown below, usually by a manometer or pressure gauge that is placed into the flow field via a small hole that is drilled into the side of the tube. Static Pressure is the pressure at a single point in the moving flow field as the gas or liquid flow moves through a system. There are four different pressure definitions used in SOLIDWORKS Flow Simulation :