Check below configuration. You need to set
rollFileEsistBehaviour="Increment"
rollInterval="Day"
rollSizeKB="Maximum size of file after which new file will be created"
timeStampPattern="dd-MM-yyyy" - file name pattern
<loggingConfiguration name="Logging Application Block" tracingEnabled="true" defaultCategory="General">
<listeners>
<add name="Rolling Flat File Trace Listener" type="Microsoft.Practices.EnterpriseLibrary.Logging.TraceListeners.RollingFlatFileTraceListener, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" listenerDataType="Microsoft.Practices.EnterpriseLibrary.Logging.Configuration.RollingFlatFileTraceListenerData, Microsoft.Practices.EnterpriseLibrary.Logging, Version=5.0.414.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" footer="-[END]---------------------------------------" formatter="Text Formatter" header="-[START]---------------------------------------" rollFileExistsBehavior="Increment" rollInterval="Day" rollSizeKB="1000" timeStampPattern="dd-MM-yyyy" fileName="c:\Logs\Applicationlogs.log" />
</listeners>
</loggingConfiguration>