 
 
4 EMD Cluster Services 
 
  EMD CLUSTER SERVICES ....................................................................................................................... 2 
4.1  Introduction to EMD CLUSTER SERVICES ............................................................................................ 2 
4.2  WAsP-CFD Cluster Calculation ............................................................................................................... 3 
  Model Overview ........................................................................................................................... 3 
  System Requirements.................................................................................................................. 4 
  Setup of a WAsP-CFD Calculation .............................................................................................. 4 
4.3  EMD-WRF Mesoscale cluster calculation ............................................................................................... 7 
  Setting up calculation in windPRO ............................................................................................... 8 
  Note about turbulence from WRF .............................................................................................. 10 
  Price structure and Meso-Credits .............................................................................................. 11 
  Validation and added information .............................................................................................. 11 
 
 
   

Introduction to EMD CLUSTER SERVICES  2

EMD CLUSTER SERVICES

4.1 Introduction to EMD CLUSTER SERVICES

At EMD we installed a High-Performance Computer (HPC) cluster in 2013 and again in 2018. This cluster gives

windPRO users access to run calculations that cannot be run or would be too time consuming to run on standard

PCs. The computing power of the HPC cluster at EMD is comparable to 2500 standard laptops. Figure 1 shows

part of EMD’s HPC cluster.

At the moment EMD-Cluster services includes two services available via windPRO:

▪ WAsP-CFD flow calculations:

▪ Run high resolution wind flow CFD model from DTU (Ellipsys3D

)

▪ On-demand WRF mesoscale model calculations:

▪ Create long-term time series using the Weather Research Forecast (WRF

) model

Figure 1 - Part of HPC Cluster installed at EMD

Operating and maintaining an HPC cluster is a complex task and running the advanced models requires a detailed

setup of many software components. The windPRO user does not have to worry about all this complexity, as all

calculations are easily set up in windPRO. Once a calculation is set up it is sent to the HPC cluster via the internet

and when the calculation is done the user will be notified via e-mail and the results can be downloaded and used in

windPRO.

An HPC cluster is a large investment, partly due to the hardware itself but also partly because of the power

consumption and cooling requirements in the data centre. Therefore, the user must pay all services separately and

not as part of a windPRO module. This is handled by purchasing “cluster credits” at EMD. The straightforward

approach is that you purchase the credits you need when you need them (or in a bunch for later use). You can also

subscribe to packages where you automatically receive new credits e.g. every month. For further details regarding

pricing please refer to: http://www.emd.dk/windPRO/wasp-products/wasp-cfd/subscription/

The following sections will describe how to use the EMD Cluster services in windPRO.

http://www.wasp.dk/Software/WAsP-CFD/Flow-model

http://www.wrf-model.org/index.php