Changes between Version 3 and Version 4 of u/erica/angularmomentumoutflows


Ignore:
Timestamp:
08/01/16 16:04:49 (9 years ago)
Author:
Erica Kaminski
Comment:

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  • u/erica/angularmomentumoutflows

    v3 v4  
    88these represent the total *accreted* mass (m_acc), center of mass (COM_acc), momentum (p_acc) and angular momentum (L_acc) from all the cells within the accretion volume surrounding the sink particle.
    99
    10 We use these quantities to update the particle's mass, COM, and so on, following:
     10We use these quantities to (conservatively) update the particle's mass, COM, and so on, following:
    1111
    1212[[latex($m'=m + m_{acc}$)]] [[br]]
     
    1818Now, angular momentum does not have the same form as above, namely:
    1919
    20 [[latex($q'=q+q_{acc}$)]]
     20[[latex($L'\neq L+L_{acc}$)]]
     21
     22as we might expect. This is because the position of the sink during the accretion event can change ever so slightly over the course of the accretion step, and thus, the angular momentum can change slightly as well (to maintain conservation of the com).. Thus, we instead write the angular momentum, post-accretion, as:
     23
     24[[latex($L'=m'r'\times v'$)]]