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We introduce the Cluster-EAGLE (C-EAGLE) simulation project, a set ofcosmological hydrodynamical zoom simulations of the formation of $30$ galaxyclusters in the mass range $10^{14}<M_{200}/\mathrm{M}_{\odot}<10^{15.4}$ thatincorporates the Hydrangea sample of Bah\'e et al. (2017). The simulationsadopt the state-of-the-art EAGLE galaxy formation model, with a gas particlemass of $1.8\times10^{6}\,\mathrm{M}_{\odot}$ and physical softening length of$0.7\,\mathrm{kpc}$. In this paper, we introduce the sample and present thelow-redshift global properties of the clusters. We calculate the X-rayproperties in a manner consistent with observational techniques, demonstratingthe bias and scatter introduced by using estimated masses. We find the totalstellar content and black hole masses of the clusters to be in good agreementwith the observed relations. However, the clusters are too gas rich, suggestingthat the AGN feedback model is not efficient enough at expelling gas from thehigh-redshift progenitors of the clusters. The X-ray properties, such as thespectroscopic temperature and the soft-band luminosity, and theSunyaev-Zel'dovich properties are in reasonable agreement with the observedrelations. However, the clusters have too high central temperatures andlarger-than-observed entropy cores, which is likely driven by the AGN feedbackafter the cluster core has formed. The total metal content and its distributionthroughout the ICM are a good match to the observations.

The Cluster-EAGLE project: global properties of simulated clusters with resolved galaxies