PHY.6:4.5 - Make the preparation compatible with the connected account

Supply the independent initial, boundary and driving conditions needed by the requested evolution. Substitute the proposed preparation into the connected relations. Solve for dependent initial values and reactions. Preserve the difference between a physical initial condition and a numerical starting guess.

A motion constraint also constrains admissible initial velocity. An electrical connection can constrain initial potentials. A spatial description needs boundary conditions appropriate to its transport and response. Determine which conditions can be chosen freely and which follow from the others.

An equation count can expose an omitted relation, but equal counts do not establish a consistent or uniquely determined problem. Examine the dependence of the actual relations and the existence conditions needed for the intended result. C.29.2 supplies the subsequent computational formulation; a solver diagnostic can help locate a problem without deciding whether the physical preparation should change.

If the preparation is incompatible, identify the conflict and its physical alternatives. Correct a mistaken initial value, relax an unjustified ideal constraint, or describe the interaction that establishes the new state. Choose among these from the actual preparation. Do not silently substitute an easier initial state.