Back to the Abstract

	1 Introduction
	2 A global disc simulation
	3 An idealized model with shear and stratification, but no rotation nor helicity
	4 Conclusions
	Appendix A: A gauge in which magnetic helicity and magnetic helicity flux are automatically gauge invariant
	Appendix B: Magnetic helicity in sub-domains
	Appendix C: Velocity gradient correlation tensor
	Appendix D: Coulomb-gauged helicity flux
	References