# Simulation Bulb Heating and Flow Pattern

Figure 1: CAD created in NOGRID's COMPASS

Figure 2: Setup the bulb heating case in the GUI

Figure 3: Result view of the bulb heating process in NOGRID points' GUI

Figure 4: Temperature plot over time for the bulb heating case

If you want to compute a thermal analysis of bulb heating including flow pattern by using simulation you can perfectly use the CFD software NOGRID points. Based on the geometrical model which can either be imported from your CAD or created with our CAD preprocessor COMPASS you can generate a computer model of a specific geometry in a very short time (compared to mesh-based methods) and see its thermal characteristics in advance.

The heat can be transferred either by heat conduction and/or heat radiation or by convection by means the flow of a fluid. You can couple also all kinds of heat transfer mechanisms. In the example below you can see the air flow inside a bulb. The screw thread is modeled as a solid (metal) and here only heat transport by conduction is given. At the tip of the heater a heat source is applied and therefore the temperature will increase over time at that position. Because the density of the air depends on the temperature the air starts to move after a while. For the heat transport within the air we used a P1 radiation model together with the solving of the usual energy balance (heat conduction and convection). This model is an example of using two different materials and computes the flow pattern in the air and the coupled temperature for both materials.

NOGRID points can perfectly be used for designing and problem solving of heat transfer cases. The speed of the temperature front and the cooling/heating rate can be predicted. NOGRID points helps to understand the flow by visualization of the mass, momentum and heat transfer of single and multiple phases. You receive integral quantities which you can use to analyze the heat exchange efficiency.

NOGRID unites abilities to handle free surface flow and moving parts in the domain and allows the simulation of any conceivable geometry and operation modes such as

• computation is in full 3D solving complete Navier-Stokes-Equations
• easy and intuitive setup for thermal analysis cases
• free definable material properties by equations or curves
• evaluation of chemical reactions and corresponding heat source terms
• open or closed domains including inflow and outflow areas (non-batch mode)
• moving of parts and flexible thermal contact behaviour

## Nogrid's strengths

NOGRID's particular strengths are the rapid preprocessing (no fluid grid needs to be generated, only the boundary mesh, inner finite points are generated automatically depending on User setting initially and during computation) and the outstandingly short computation time even for complicated cavities.
As you can see in the image below, the boundary of the geometry still requires a mesh to allow the interior finite points to detect the boundary. The boundary must therefore be meshed and the finite points inside are automatically generated during the simulation controlled by User specifications.

## What is CFD from NOGRID?

CFD solves the fundamental equations that define the fluid flow process. With CFD software from NOGRID every engineer makes better decisions by predicting, analyzing and controlling fluid flow, heat and mass transfer or chemical reaction. By using NOGRID software you receive information on essential flow characteristics as for example flow distribution. Using it additional to testing and experimentation NOGRID software helps to improve the evaluation of your design – resulting in better construction and operation parameters, increasing planning security and money savings due to faster time to the marketplace for your product or process.

## Choose NOGRID

With NOGRID, you choose professional CFD software and services – our aim is helping you to be successful. When you decide to work with NOGRID you choose close cooperation with a dynamic, flat hierarchies-organization. Short information channels result in quick and accurate professional support and service. Our team consists of highly qualified employees, who are experts in fields such as numerical simulation or computational fluid dynamics. Based on our know-how, we are pleased to offer the following services, responding to your individual requirements:

## TRAINING

In our two-days training courses you will learn, how to use NOGRID CFD software efficiently. Our technical support team will teach you how to handle and solve different cases.

For more details please refer to Training Courses →

## Technical Support

We offer full professional support from the minute you start using our software, by telephone or by email. Contact us, when ever needed.

For more details please refer to Software Support

## Service

Lack of time or resources and other constraints often make outsourcing an attractive solution. We help you with your flow modeling needs. Based on our engineering expertise in this field we offer individual numerical simulation services matching the unique needs of your organization.

For more details please refer to Simulation Services →

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info@nogrid.com